The fellowship recognises his research and entrepreneurial achievements. As a researcher he was part of the team which developed the Erbium-Doped Fibre Amplifier (EDFA), which is now a ubiquitous part of the optical fibre networks that underpin the global internet. Simon has also led the establishment of an export-competitive photonics industry in Australia, having founded manufacturing companies in Australia that have generated high-value-add export revenues. His experience at the interface between research and industry is widely recognised and we are very lucky to have him leading our Industry Advisory Board.
In the lead-up to the International Day of Light celebration this Saturday 16th May, Dodd-Walls Centre Principal Investigator Cather Simpson has written this articleon the incredible potential of light-based technologies to address the global food-crisis in the wake of the pandemic. She describes how light can be harnessed as an energy source, a sensor, and a tool to increase food production and the sustainability of farming. As the world faces the devastating consequences of the COVID pandemic, the science of light offers hope and potential solutions. This year the celebration falls on the sixty year anniversary of the invention of the laser, which Cather describes as an event “as important as the invention of the wheel.”
The Hamilton Award, the Royal Society Te Apārangi Early Career Research Excellence Award for Science, is awarded annually for the encouragement of scientific research by early-career researchers currently based in Aotearoa. This prize is associated with the Hamilton Lecture every third year, but this year we will be introducing our 2016 to 2018 winners digitally.
Physicist and self-confessed minimalist, Dr Miro Erkintalo, who takes “tweezers” to laser light, was presented the Hamilton Award in 2016.
Miro, shares what it is like to win the Hamilton Award, how to draw balance between personal life and research, his hopes for the future, and what it is like settling down on the other side of the world.
The eighth Asia Pacific Conference on Optical Sensors (APOS) was held in Auckland over the 19-22 November in 2019. This conference bought together 175 Asian and Pacific researchers with a focus on optical sensing.The APOS plenary speakers presented talks of relevance to the DWC cohort. Heike Ebendorff-Heidepriem (University of Adelaide) highlighted the achievements of her laboratory’s research into adapting the properties of optical fibres using physical and chemical mechanisms to sensing, and how her laboratory has collaborated successfully with industry. Kentaro Nakamura (Tokyo Institute of Technology) described his laboratory’s studies into acousto-optic effects and how to use optics to spatially measure sound pressure levels in air as well as to improve optical coherence tomography swept source and scanning systems. Helen Pask (Macquaire University) outlined her laboratory’s use of Raman spectroscopy to remotely measure subsurface water temperature, the potential applications of which are easy to see as ocean temperature monitoring is becoming increasingly important.
The invited speakers continued the trend of varied and interesting talks; the topics extended from passive resonant optical gyroscopes to monitoring malaria and integrated photonic nanostructures, with one-shot 3D imaging in between. DWC’s own Neil Broderick described his forays into the field with Kasper van Wijk, James Loveday, and other national and international scientists interested in studying NZ’s alpine fault pre-earthquake. Not to buck the trend the contributed talks and posters also displayed a wide range high quality research. The most nationally appropriate research had to be the two-dimensional strain sensor based on opal presented by Judith Dawes of Macquarie University.
A third of conference attendees were students; all of whom were eligible for eight student awards from the Optical Society of America. Further, two student awards were available to Australian Optical Society members. Across these 10 student prizes DWC was well represented: Farhan Azeem (UoO), Jonathan Simpson (UoA) and Fang Ou (UoA) all received prizes.
“APOS was a great experience. I had the opportunity to take a more active part in the running of the conference and had my first experience of being chair for one of the sessions. At the conference I also had the chance to engage with other researchers working on optical sensing, which was a great learning experience.” – Fang Ou
“APOS 2019 was a great opportunity to learn about the world-class research being undertaken in optical sensing and discuss my research with international attendees. I particularly enjoyed the presentations related to optical sensing for geophysical applications and gained several ideas to apply to my research.” – Jonathan Simpson
“APOS 2019 provided me with an excellent opportunity to showcase my PhD research. It allowed me to interact with pioneers in the field of optical sensing. Moreover, the talk given by Dr. Kristen Maitland about detection of pulmonary tuberculosis was very interesting.” – Farhan Azeem
APOS 2019 was capped off with lab tours through the photoacoustic laboratory, the Photon Factory and the biophotonics laboratory. This was a highlight for several of our conference attendees and many were impressed with the work occurring within these laboratories. Further, these lab tours generated interest in the Dodd-Walls Centre, its aims, and who Dodd and Walls were.
Look out for Lab In A Box at Polyfest 2020! The Dodd-Walls Centre has teamed up with Otago Museum to take the shipping container come science lab for a four day show from the 18th to 21st of March at the Manukau Sports Bowl for Polyfest.
This is an exciting opportunity to let experiments burst out of the universities and engage with the Māori and Pacific communities in Tamaki Herenga Waka.
Be on the lookout for lasers, volcanoes and some colourful characters.
Dodd Walls researchers lead by Mikkel Andersen have achieved the first bottom-up assembly of three atoms held in an optical trap.
A myriad of equipment including lasers, mirrors, a vacuum chamber, and microscopes assembled in Otago’s Department of Physics, plus a lot of time, energy, and expertise, have provided the ingredients to investigate this quantum processes, which until now was only understood through statistical averaging from experiments involving large numbers of atoms.
The experiment improves on current knowledge by offering a previously unseen view into the microscopic world, surprising researchers with the results.
“Our method involves the individual trapping and cooling of three atoms to a temperature of about a millionth of a Kelvin using highly focused laser beams in a hyper-evacuated (vacuum) chamber, around the size of a toaster. We slowly combine the traps containing the atoms to produce controlled interactions that we measure,” says Associate Professor Mikkel F. Andersen of Otago’s Department of Physics.
When the three atoms approach each other, two form a molecule, and all receive a kick from the energy released in the process. A microscope camera allows the process to be magnified and viewed.
“Two atoms alone can’t form a molecule, it takes at least three to do chemistry. Our work is the first time this basic process has been studied in isolation, and it turns out that it gave several surprising results that were not expected from previous measurement in large clouds of atoms,” says Postdoctoral Researcher Marvin Weyland, who spearheaded the experiment.
For example, the researchers were able to see the exact outcome of individual processes, and observed a new process where two of the atoms leave the experiment together. Until now, this level of detail has been impossible to observe in experiments with many atoms.
“By working at this molecular level, we now know more about how atoms collide and react with one another. With development, this technique could provide a way to build and control single molecules of particular chemicals,” Weyland adds.
Associate Professor Andersen admits the technique and level of detail can be difficult to comprehend to those outside the world of quantum physics, however he believes the applications of this science will be useful in development of future quantum technologies that might impact society as much as earlier quantum technologies that enabled modern computers and the Internet.
“Research on being able to build on a smaller and smaller scale has powered much of the technological development over the past decades. For example, it is the sole reason that today’s cellphones have more computing power than the supercomputers of the 1980s. Our research tries to pave the way for being able to build at the very smallest scale possible, namely the atomic scale, and I am thrilled to see how our discoveries will influence technological advancements in the future,” Associate Professor Andersen says.
The experiment findings showed that it took much longer than expected to form a molecule compared with other experiments and theoretical calculations, which currently are insufficient to explain this phenomenon. While the researchers suggest mechanisms which may explain the discrepancy, they highlight a need for further theoretical developments in this area of experimental quantum mechanics.
Andersens team at the University of Otago were supported by Dodd-Walls theorists from Massey University.
The Julius von Haast Fellow, Prof Gerd Leuchs of the Max Planck Institute for the Science of Light in Erlangen, Germany, visits DWC PI and host Harald Schwefel for a month and presents “Coupling between light and a small sub wavelength matter particle”.
His visit is funded through the Julius von Haast Fellowship of the MBIE & RSNZ Catalyst:Leaders programme.
DWC Investigators Schwefel and Lambert publish their invited review on “Coherent Conversion Between Microwave and Optical Photons–An Overview of Physical Implementations” in Advanced Quantum Technologies and are featured on the cover.
Spatially separated quantum technologies will need to communicate using optical channels, rather than at microwave frequencies which correspond to the energy scales of superconducting qubits. The theoretical description underlying the different physical implementations of up‐conversion is the beam‐splitter Hamiltonian. A classical driving field is depicted as a Gaussian field distribution and the quantized pulses are shown in red (microwave) and blue (optical).
In article number 1900077, Nicholas Lambert, Harald G. L. Schwefel, and co‐workers review current experimental implementations.
What happens when you stir a superfluid? Able to flow without resistance, superfluids respond by forming quantized vortices – tiny storms that interact with each other to create quantum turbulence.
Due to its complexity, turbulence is one of the persistent enigmas in Physics. In superfluid helium there is a further challenge: the vortices are so small that measuring the chaos they create is technically challenging. This challenge also offers an advantage as helium can hold a lot of vortices, providing a fertile platform for the study of fully-developed quantum turbulence.
Using a new nondestructive measurement protocol, the experimental group of Professor Warwick Bowen at the University of Queensland were able to track vortices in thin films of turbulent superfluid helium-4. Sachkou et al. developed a technique for the nondestructive tracking of vortices in a thin film of superfluid helium-4. Their system contained a microtoroid optical cavity coated by a thin film of helium-4. Vortices were created and measured using laser light that can efficiently couple into the cavity. Surprisingly, coherent vortex dynamics were found to strongly dominated over dissipation by five orders of magnitude. The on-chip platform provides a new way to study emergent phenomena in strongly interacting superfluids, and to develop quantum technologies such as precision inertial sensors.
Theory collaborator, Dr Ashton Bradley of the Dodd-Walls Centre says “…this experiment opens up new territory for fundamental understanding of quantum turbulence, and also has potential applications in high precision sensing… exciting progress in a challenging field.”
The research was a collaboration between researchers in the ARC Centre of Excellence for Engineered Quantum Systems (EQUS) and ARC Centre of Excellence in Future Low-Energy Electronic Technologies (FLEET) in Australia, and the Dodd-Walls Centre for Photonic and Quantum Technologies in New Zealand. It was supported by the United States Army Research Office and the Australian Research Council, and and was published in the journal Science.
In early December, Otago Dodd-Walls students hosted the 12th Conference on Optics, Atoms and Laser Applications, known as KOALA. This is an annual, international student conference supported under the International OSA Network of Students (IONS) programme, which supports conferences run for students, by students.
The programme consisted of a series of student talks and poster presentation, with invited speakers giving plenary talks. Attendees covered a range of topics in optical and quantum sciences, from structural colour production in insects, to spectroscopy of meat predicting quality, and from quantum squeezed light for observing gravity waves, to quantum computing and entanglement. Invited speakers, who were international experts in their fields, gave talks on optical simulations, quantum vorticies, nanotechnology / metasurfaces, and the science of precision measurement. KOALA also included workshops
on science communication, and professional skills for future careers of the attendees.
The 60 students who attended the conference comprised mostly early stage PhD candidates, though this ranged from undergrad and honours to senior PhD students. While most were from Australia and New Zealand, there were representatives from across the globe, including the US, UK, Philippines, Poland, and China. The conference was well received by the attendees, with many noting the relaxed atmosphere “takes off much of the pressure when presenting”, and the variety of presentations introducing “topics
[they] never knew existed”.
The Dodd-Walls Centre was a Gold sponsor to KOALA 2019.
The Otago University OSA Student Chapter is hosting the 3rd annual Conference on Optics, Atoms and Laser Applications – IONS-KOALA 2010. KOALA will take place from the 29th of November to the 3rd of December.
KOALA is geared primarily towards PhD students from New Zealand and Australia working in an optics-related field. Topics include:
Last night, two of our industry-facing research stars were recognised for their research at the Royal Society of New Zealand Te Apārangi 2019 Research Honours.
Professor Cather Simpson was awarded the Pickering Medal which recognises excellence and innovation in the practical applications of technology.
Cather was recognised for her pioneering research and commercialisation of innovative photonic technologies, which are addressing challenges with a New Zealand focus and global impact. She has developed this technique for micromachining and microfabrication and she has also spun out the technology to solve problems in New Zealand’s agricultural sector. These include being able to sort sperm by sex and assess the composition of milk for every cow at every milking.
Professor Keith Gordon was awarded the MacDiarmid Medal which is for outstanding scientific research that demonstrates the potential for application for human benefit.
This award was for his innovative use of spectroscopy to understand the molecular structure of a wide range of materials – from solar cells, fish oils, to plastics in the environment. His research has optimised solar cells and he has developed methods to identify the different crystalline forms of pharmaceuticals, even at the nano-scale. He has also developed methods to assess the quality and composition of foodstuffs, including dairy, fish and horticultural products.
Our Dodd Walls Member Amita Deb has been awarded 2019 MBIE Endeavour Round Smart Ideas funding
Dr Amita Deb from Otago’s Department of Physics has been awarded a 2019 MBIE Endeavour Round Smart Ideas funding for the project “Contact-free sensing of high voltages using a laser electrometer”. The three-year project, valued at $1M will lead to the development of a novel monitoring technology for the New Zealand national grid. Associate Professor Niels Kjærgaard is an associate investigator on the project.
The Dodd-Walls Center helium-3 dilution refrigerator has arrived and been commissioned. The fridge is the only one of it’s type in New Zealand. It enables objects to be cooled down to with 0.02°C of -273.15°C, the absolute zero of temperature.
Exciting results are already flowing from experiments using the fridge. It will allow Dodd-Walls researchers to continue their development of optical networking technologies that can interface with superconducting qubit based quantum computers.
Dodd Walls researchers Mike Reid, Jon Wells and Jevon Longdell hosted the 20th International Conference on Dynamical Processes in Excited States of Solids (DPC19) at the Chateau on the Park, Christchurch, in the week of August 26-30. Mike and Jon (Canterbury) handled local organisation and Jevon Longdell (Otago) was the Programme Chair. Dodd-Walls was a major sponsor.
Of 93 scientific participants 73 were from overseas (26 from China). There were 34 students (23 from overseas). Particularly pleasing was the large number of overseas students. 11 of the Chinese participants arrived on the direct flight from Guangzhou on the Sunday evening. That connection certainly makes travel to Christchurch from China very efficient, and they just fitted into the 11-seat shuttle ordered for them!
Many of the presentations were on Quantum Information and Nanoparticle applications, which was highly relevant to the Canterbury and Otago students. This was an excellent opportunity for them to discuss their work with prominent people in those fields. Jamin Martin from Canterbury, and Peter Barnett, from Otago won two of the six poster prizes. The winners had a good geographical spread: New Zealand, China, Poland, and Australia.
DPC was previously run in Christchurch in 2003, Chaired by Roger Reeves. The participants, and the subject areas, have changed dramatically since then. Particularly notable is the large increase in Chinese participants. The next conference is in 2022 in Wrocław, Poland.
The conference ran smoothly thanks to for the great work put in by Canterbury and Otago students and University of Canterbury support staff.
Bryan Crump stirs a cup of tea with Dr. Ashton Bradley from Otago University. He’s part of a research collaboration with the University of Queensland which has just published a report in the magazine Science with some breakthrough findings in fluid turbulence which may have implications for our understanding of quark-gluon plasmas, electrons in solids, and the persistence of Jupiter’s Great Red Spot, or could help create more efficient transportation.
Eric Cornell is an American physicist who, with Carl Wieman and Wolfgang Ketterle, won the Nobel Prize for Physics in 2001 for creating a new ultracold state of matter, the so-called Bose-Einstein condensate (BEC).
The existence of the condensate had been predicted by Albert Eistein, among others, and Cornell had been searching for it for over 10 years before his breakthough – which was discovering that chilling and slowing atoms caused them to merge into a single entity. Eric Cornell has been in New Zealand to attend the 24th International Conference On Laser Spectroscopy (ICOLS), hosted by the Dodd-Walls Centre, New Zealand’s national research group for photonic and quantum technologies, which combines top scientists from across the country and is based at the University of Otago.
Click here to listen to Eric’s Interview with Kim Hill
The International Conference on Laser Spectroscopy is a biennial conference concerning developments and applications of precision measurement and control in atomic systems. The 24th ICOLS was held in Queenstown from July 8th until 12th, and attracted about 170 participants from around the world.
Highlights included the stunning line up of plenary speakers, including Professors Eric Cornell (Nobel Prize 2001), Ana-Maria Rey, Tilman Pfau, Jun Ye, and Holger Mueller. An array of invited and hot topic talks (including our very own Assoc. Prof. Niels Kjaergaard and Scott Parkins) highlighted research at the cutting edge of the field. The conference was well attended by Dodd-Walls Members, with many of the approximately 150 poster presentations showcasing our research.
Two memorial sessions celebrated the contributions of two key members of the ICOLS community who recently died: Our own Prof. Howard Carmichael spoke on the contributions of Professor Roy Glauber (Nobel Prize 2005), who had deep connections to the quantum optics community in New Zealand. Prof. Ken Baldwin spoke on the life and contributions of Professor Wim Vassen, followed by an impressive talk from Yuri van der Werf on recent research in the Vassen group. Prof. Vassen’s work was on Helium spectroscopy and the production of ultra-cold Helium gases, and included collaborations with Dr Maarten Hoogerland.
Participants enjoyed a fantastic week in Queenstown including a superb conference dinner at Walter Peak Station. It was quite amazing to see so many quantum physicists in awe of the steam engines on the TSS Earnslaw used to ferry us over to the station. Huge credit to our Prof. David Hutchinson who made the bid to hold ICOLS in New Zealand 2 years ago, and who chaired the organizing committee.
At the conclusion of the meeting it was announced that ICOLS-2021 will be in Colorado organized by a team from Boulder.
Over 300 people (290 from overseas and from 34 countries) collected in Auckland the week of 8 July 2019 to discuss the latest developments and applications of vibrational spectroscopy.
The tenth International Conference on Advanced Vibrational Spectroscopy (ICAVS10) was enjoyed by all due to the excellent and varied programme. There was a series of plenary lectures that covered a wide range of topics, including the application of near infrared spectroscopy in food industries, plasmon-enhanced Raman spectroscopy, developing an infrared-based device for clinical application, and nonlinear vibrational spectroscopy for the study of interfaces. The range of oral and poster presentations was even more extensive.
The exhibition space highlighted the latest technology available in vibrational spectroscopy, including a quantum cascade laser based mid-infrared imaging system and frequency comb-based IR spectrometer.
At ICAVS10 we tried to make sure there were plenty of opportunities for students and early career researchers to network and embrace the conference experience, for example, several students were given the chance to chair a session, and there was a sponsored student pub night.
The conference was a success and many of the attendees will, no doubt, see each other at the next ICAVS in Krakow in 2021.
Today DWC investigators Stuart Murdoch, Miro Erkintalo, Stéphan Coen and Harald Schwefel publish an article on generating an Octave-spanning tunable parametric oscillationin crystalline Kerr microresonators in Nature Photonics. This work is a close collaboration between the DWC groups at the Universities of Auckland and Otago.
An atom in the ground state subject to weak illumination will jump up, in an instant, to the excited state at some random time. At least this is a standard description of the process which is at the heart of many light-matter interaction processes.
Dodd Walls theorist Howard Carmichael has shown that this is only an approximation to the true behavior. In fact, if the environment of the atom is monitored carefully enough, quantum jumps are actually a smooth and deterministic process that can be reversed half way through.
Working with an experimental group from Yale University this has been demonstrated experimentally using superconducting qubits as the “atom”.
The results are published in this week’s issue of Nature.
DWC member Andrus Giraldo was one of the seven winners of the famous Red Sock Award for best poster at the biennial SIAM Conference on Applied Dynamical Systems, held with over 1000 participants in Snowbird, Utah last week. The award consists of a pair of red socks and a cash prize, handed over in person by Prof James A Yorke (the University of Maryland, famous for his paper “Period three implies Chaos”), who wears only red socks himself.
Nathan Pages manages to capture part of the award ceremony.
The only other time that we had such a success for the University of Auckland was in 2009 when Ph.D. student Emily Harvey won a Red Sock Award (see the report in the July 2009 issue of DSWeb Magazine. Claire Postlethwaite has also won a Red Sock Award, but it was in 2003, well before she became affiliated with the University of Auckland (this was reported in the first-ever DSWeb Magazine issue from October that year).
The DWC ran a highlight event in Auckland this year for Techweek19. It was a lively event with speakers including Hon Megan Woods, Prof Cather Simpson, and Charlotte Walshe. The event focussed on Prof Cather Simpson’s journey from idea to acquisition for Engender, and thoughts on how to encourage academic entrepreneurship. We had strong attendance from DWC members and members of the innovation network, MBIE, Callaghan and the investment community. Feedback on the event was extremely positive, and we are proud to have been one of the highlight events of Techweek19.
Minister Woods was able to attend and speak in her capacity as Minister for Research, Science and Innovation. She spoke to the success of the CoREs, including the importance the CoREs play in the national innovation system as catalysts of ideas and ground breaking research. She commended the Dodd-Walls Centre on being a great example of a successful Centre of Research Excellence with our internationally acknowledged, ground breaking research. Our commitment to our diversity and gender equity also received a special mention with regard to our Carer’s Fund.
A team of University of Otago/ Dodd-Walls Centre scientists have created a novel device that could enable the next generation of faster more energy efficient internet. Their breakthrough results have been published in the world’s premiere scientific journal Nature this morning.
The internet is one of the single biggest consumers of power in the world. With data capacity expected to double every year and the physical infrastructure used to encode and process data reaching its limits there is huge pressure to find new solutions to increase the speed and capacity of the internet.
Principal Investigator Dr Harald Schwefel and Dr Madhuri Kumari’s research has found an answer. They have created a device called a microresonator optical frequency comb made out of a tiny disc of crystal. The device transforms a single colour of laser light into a rainbow of 160 different frequencies – each beam totally in sync with each other and perfectly stable. One such device could replace hundreds of power-consuming lasers currently used to encode and send data around the world.
The work was born out of Dr Schwefel’s previous research at the prestigious Max Planck Institute in Germany and his collaboration with Dr Alfredo Rueda who did some of the preliminary research.
The internet is powered by lasers. Every email, cell phone call and website visit is encoded into data and sent around the world by laser light. In order to cram more data down a single optical fibre the information is split into different frequencies of light that can be transmitted in parallel.
Dr Kumari says the current infrastructure is struggling to cope with demand as internet consumption increases significantly.
“Lasers only emit one colour at a time. What this means is that, if your application requires many different colours at once, you need many lasers. All of them cost money and consume energy. The idea of these new frequency combs is that you launch one colour into the microresonator a whole range of new colours comes out,” Dr Kumari says.
“It’s a really cool energy saving scheme,” says Dr Schwefel, “It replaces a whole rack of lasers with small energy efficient device.”
He expects the devices to be incorporated in sub-oceanic landing stations where all the information from land based fibres is crammed into the few sub-oceanic fibres available in less than a decade, perhaps within a few years.
“To develop the device for the telecommunications industry we will need to start working with major telecommunications companies,” Dr Schwefel explains. “We have started the process by collaborating with a New Zealand-based optical technology company.”
This breakthrough is the first milestone in a government funded collaboration between scientists at the University of Otago and the University of Auckland who are part of the Dodd-Walls Centre for Quantum and Photonic Technologies – a virtual organisation gathering New Zealand’s top researchers working in the fields of light and quantum science. The research project has been awarded nearly one million dollars of Marsden Fund money to develop and test the potential of microresonator frequency combs.
The optical frequency combs are based on a very unusual optical effect that happens when the intensity of light builds up to extremely high levels. You send a single colour of visible light into the crystal disc along with a microwave signal and because the crystal disc is such high quality, the light and microwave radiation gets trapped inside. The light and microwave radiation keeps pouring in and bouncing around and around inside the crystal. In most situations light never changes colour but in this case the intensity becomes so high that the light and the microwave radiation start merging and making different colours. The phenomenon is known as a non-linear effect and it has taken the team many years to optimise.
The only other group in the world making devices of competing quality is a collaboration from Harvard and Stanford Universities in the US, also published in this month’s Nature, but currently Drs Schwefel and Kumari hold the record for the most efficient device. Essentially this means that their crystals don’t leak any light. The trick is to have an extremely high quality crystal. Harald’s group are a world experts in crafting crystal discs in his University of Otago lab.
The internet is just one of the possible applications for the new optical frequency combs. Another use is high-precision spectroscopy — using laser light to study and identify the chemical composition, properties and structure of materials including diseases, explosives and chemicals. Dr Kumari’s next mission will be to explore this application amongst other possibilities.
“This is a very very exciting project to be working on,” says Dr Kumari. “Optical frequency combs have literally revolutionised every field of applications they have touched. You can use them for vibrational spectroscopy, distance measurement, telecommunications. I’m looking forward to seeing how we can use ours.”
A team of University of Otago / Dodd-Walls Centre scientists have created a novel device that could enable the next generation of faster more energy efficient internet. Their breakthrough results have been published in the world’s premiere scientific journal Naturethis morning.
The internet is one of the single biggest consumers of power in the world. With data capacity expected to double every year and the physical infrastructure used to encode and process datareaching its limits there is huge pressure to find new solutions to increase the speed and capacity of the internet.
Principal Investigator Dr Harald Schwefel and Dr Madhuri Kumari’s research has found an answer. They have created a device called a microresonator optical frequency comb made outof a tiny disc of crystal. The device transforms a single colour of laser light into a rainbow of 160 different frequencies – each beam totally in sync with each other and perfectly stable. One such device could replace hundreds of power-consuming lasers currently used to encode and send data around the world.
The Australian and New Zealand School in Ultracold Physics (ANZSUP) is a one-week graduate summer school for students at Master level and beginning PhD students. When creating temperatures in the lab that are colder than outer space, the behaviour of matter is dominated by the laws of quantum mechanics. The ANZSUP summer school is aimed at providing graduate students with the relevant background in experiments and theory in the field of ultra-cold physics. This year’s school covered the following topics:
– Laser trapping and cooling of ultra-cold atoms
– Atom optics
– Magnetism in quantum gases
– Phase space methods and stochastic differential equations
– Quantum physics and general relativity
– Lecturers from Australasia and further afield will provide mini-courses on a given topic. In addition to lectures, we plan hands-on activities including a programming workshop in the computer language Julia.
The Ultracold Atomic Physics School will be held in Dunedin, New Zealand at the University of Otago hosted by the Dodd-Walls Centre for Photonic and Quantum Technologies.
The lectures will be held in the Physics Department, Level 3, Science III Building, 730 Cumberland Street, Dunedin.
Accommodation for the 2019 ANZSUP Summer School has been booked at the Caroline Freeman Residential College for the cost of $70 per night including breakfast. The College is a 5 minute walk from the University of Otago Campus.
The fees for attending this year’s ANZUP are $300 (New Zealand dollars). A limited number of scholarship are available (see below). The fee includes lunches and supports the costs of running the school.
23 November 2018: Application deadline for scholarships 14 December 2018: Registration deadline 20 January 2019: Travel day for arriving in Dunedin. 21 January 2019: Lectures will start in the morning. 25 January 2019: Lectures will finish at noon.
Congratulations to Dr Simon Poole and his team at Finisar Corporation (NASDAQ: FNSR) for winning the Australian Prime Minister Prize for Innovation for 2018. Simon is the Chair of the Dodd-Walls Centre’s Industry Advisory Board.
Simon and his team have invented technologies that make global internet connections faster.
The global internet we rely on is carried by optical fibres that link continents, countries and cities. The speed and volume of internet traffic was limited by the need to convert data from light to electrical signals for switching and processing. To tackle the speed problem, the Finisar team created light-bending switches using prisms, liquid crystals and silicon, which have dramatically improved the capacity and reliability of the internet. One switch can handle one million simultaneous high definition streaming videos.
The team are now working to boost the capacity of their devices further to meet the demands of 5G and the Internet-of-Things.
Dodd-Walls Centre principal investigator Dr Frédérique Vanholsbeeck has been recognized by the Australian Optical Society (AOS). Dr Vanholsbeeckhas been awarded the OSA Diversity and Inclusion Advocacy Recognition award based on her profound influence on the practices of her university and more generally in New Zealand science, and through her work on the AOS Council. She has been a vocal promoter of gender parity in selecting invited conference speakers, based on her belief that this is central to giving these conferences, and scientific fields they represent, a positive image to junior female students. Amongst other things, as AOS Councillor she promoted a policy that AOS only sponsors events that have appropriate gender and diversity policies, and she has argued to ensure that each AOS prize has at least one female applicant.
Dr Vanholsbeeck is a senior lecturer at The University of Auckland and has been a member of the Dodd-Walls Centre since 2015.
Congratulations to Dominik Vogt from The University of Auckland who has passed his oral examination, and has now handed in the final version of his thesis ‘Development and Characterization of Waveguides and Whispering-Gallery Mode Resonators for Terahertz Radiation’. The reports from the examiners were so favourable that the thesis has been added to the Dean’s List reserved for the top 5% of PhD students. Dominik’s supervisor Associate Professor Rainer Leonhardt is delighted that Dominik will continue to work for the DWC as a Research Fellow, with his main emphasis on THz devices based on a Si platform.
Universal suffrage is a human rights issue, but WINNING the right to vote was a movement that required vision and gutsy leadership. This year is the 125th anniversary of women winning the right to vote in New Zealand. At this year’s Dodd-Walls Symposium (www.doddwalls.ac.nz) at Auckland on Tuesday, June 26th, an open-to-the public (6:00-7:30 PM) presentation and discussion will be held on the theme of Women’s leadership in science and industry: 125 years on from the suffragists. The Dodd-Walls Centre hereby extends an invitation to all to join this celebration and forward-looking discussion.
Three extraordinary leaders will give their personal perspectives on the theme as women with exemplary leadership records, vision, and drive: Professor Margaret Brimble (University of Auckland and first NZ woman to be elected as a Fellow of the Royal Society of London), Dr Frédérique Vanholsbeeck (University of Auckland, Senior Researcher of the Dodd-Walls Centre and NZ Food Safety Science & Research Centre), and Ms Charlotte Walshe (CEO of Jade Software and a Board member of NZTE).
Date: Tuesday, 26 June 2018, 6:00 to 7:30 PM
Location: The University of Auckland Business School, 12 Grafton Road, Room OGGB3
Professor Artur Ekert, one of the inventors of quantum cryptography, will be speaking on Wednesday 9th May at the Otago Museum (5.30pm Hutton Theatre). The talk, “Is there a perfect cipher?” is for a general audience. Artur is the Director of the Centre for Quantum Technology in Singapore and a Fellow of Merton College, Oxford. He is visiting the Dodd-Walls Centre for Photonic and Quantum Technologies at the University, with whom he is a member of the Science Advisory Board. – Click here
DWC Board Member Physicist Professor Richard Blaikie shares his perspectives on what social science and the humanities can bring to the physical sciences and the role of te ao Māori in research in Aotearoa. Click here
The Dodd-Walls Centre sponsored 10 students from across New Zealand to take a seat on the Air New Zealand Dreamliner flight to the skies over Antarctica. The students had great views of the aurora and learned about the science behind the lights from experts from the Dodd-Walls Centre and Otago Museum. The Dodd-Walls Centre is committed to research excellence and science outreach, encouraging more kiwis to appreciate and engage in science and the amazing world around us.
Check out some amazing Southern Lights footage in this article from the Otago Daily Times. Video credit: Brad Phipps, Photo credit: Taichi Nakamura
When the Auckland harbour bridge lights up at 12.01 am on Wednesday 16th May, it will signal the beginning of world-wide celebrations for the International Day of Light. The six-minute Vector light and sound show will depict light and energy from the earliest origins of human settlement in New Zealand, through the Maori creation story, to the possibilities for a future world harnessing the true potential of energy and light technologies. Chair of the New Zealand Committee for the International Day of Light, Professor David Hutchinson, today announced that with Vector lighting up of the bridge, New Zealand would once again lead the world in the celebrations of a United Nations light event. “Three years ago New Zealand led the world in celebrating the International Year of Light, the initiative of New Zealander Professor John Dudley, who worked for many years to secure an International Year of Light to raise awareness of the achievements of light science and its applications. This time, the UN is celebrating the first official International Day of light, and once again, New Zealand leads the celebrations.” – Click here
DWC members extend congratulations to Dr Simon Poole, on the occasion of his Australia Day 2018 Honour. Dr Poole has bee recognised as Officer (AO) in the General Division of the Order of Australia. The honour recognises his distinguished service to science in the field of photonics research and development, as an academic, and to the telecommunications industry through advisory roles and board memberships.
The 10th HOPE Meeting will be held in March 2018, in Yokohama, Japan and is an opportunity for Fang to engage in interdisciplinary discussions with Nobel Laureates and other distinguished scientists pioneering the frontiers of knowledge. Fang is in the second year of her PhD working on fluorescence spectroscopy techniques under the supervision of DWC Investigator, Frédérique Vanholsbeeck. Congratulations Fang!
Using ultra-fast laser manufacturing, DWC Investigator Cather Simpson will lead a project to develop portable and handheld devices for skin cancer diagnosis with the potential to provide a non-invasive method to detect cancerous skin lesions.
DWC Investigators hosted representatives from the High-Value Manufacturing sector in the newly inaugurated DWC Prototyping Facility in Auckland on 29 November. Drinks, canapes, robust debate and discussion focusing on how Universities can assist the sector ensured a very interesting and thought provoking evening. Guest speakers were: Andrew Somervell – VP Products & Technology, F&P Healthcare; Berri Schroder – Entrepreneur and Investor and Greg Shanahan – Co-founder, Veriphi, TIN Managing Director. Find out more about Lighthouse Events
We are delighted to congratulate the following DWC Investigators on their success in the 2017 Marsden Funding round, announced earlier in November. The Marsden funding round is open to a diverse range of research topics and for DWC members and their physics research to be so successful, it is an outstanding achievement. Congratulations!
Dr Harald Schwefel (Otago) and Dr Miro Erkintalo (Auckland) – Microresonator frequency combs through second-order nonlinearities $910,000 Dr Ashton Bradley (Otago) and overseas collaborators – Making, Probing, and Understanding Two-Dimensional Quantum Turbulence $905,000 Professor Uli Zuelicke (Victoria) and collaborators – Supercharging electromagnetism: Tuneable magnetoelectricity in unconventional materials $905,000 Dr Amita Deb (Otago) – Single photon control of optical phase using ultracold Rydberg atoms $300,000 (Marsden Fast Start) Dr Kai Chen (Victoria) – Photoluminescence shines a light on the exemplary optoelectronic properties in hybrid organic-inorganic perovskites $300,000 (Marsden Fast Start)
Congratulations to DWC Investigator Rainer Kunnemeyer’s PhD Student, Harpreet Kaur, winner of the 3MT (Three minute thesis) competition at Waikato University. Harpreet also took out the People’s Choice Award. On 29 September, Harpreet presented at the 3MT Asia-Pacific Competition in Brisbane and was one of fifteen participants chosen for the Editor’s choice award which will be published in leading scientific magazine COSMOS.
Harpreet’s presentations described the PhD work she is doing on fruit quality sensing. Well done, Harpreet!
Congratulations to DWC Industry “New Ideas” competition prize winners Rakesh Arul, University of Auckland (below left) and Adrian Delgado, University of Otago (below right) pictured receiving their awards and $1000 prize from John Harvey, DWC Industry Team Leader.
Congratulations to DWC Investigator Blair Blakie and his Summer Students Nanako Shitara and Shreya Bir on the publication of their video abstract “Domain percolation in a quenched ferromagnetic spinor condensate” in the Institute of Physics New Journal of Physics. This is an incredible achievement for two very young and bright students!
Congratulations to DWC PhD student Ryan Thomas who was presented with the Hatherton Award at the RSNZ Awards Dinner on 9 October. The Hatherton Award is for the best scientific paper by a PhD student at any NZ university in the field of chemical sciences, physical sciences, mathematical and information sciences. Our congratulations also go to Associate Professor Niels Kjaergaard, Ryan’s PhD Supervisor (pictured below with Ryan Thomas).
DWC Director Prof David Hutchinson, features in an article in the latest edition of the Otago Post. This article highlights the value of our postgrad students and the wealth of opportunity for involvement as part of the DWC.
DWC Professor Blair Blakie became an official Visiting Fellow of the Institute of Quantum Optics and Quantum Information (IQOQI) last week at the Austrian Academy of Sciences, Innsbruck. Congratulations to Blair on this honour! The last appointee was Professor Crispin Gardiner (formerly Director of the DWC), so New Zealand represents 50% of their four visiting fellows so far.
Ag at Otago and Dodd-Walls Centre for Photonics and Quantum Technologies collaborate to host a two day workshop on Enterprise and Innovation for University of Otago postgraduate students.
The workshop, led by Dr Chris Kirk, Univentures Ltd and who has considerable expertise in this area, commenced yesterday and will re-convene on 16 August 2017. The workshop will identify ways scientific discoveries and ideas can be translated into practical outcomes.
As part of the Education Outreach programme, Otago Museum and DWC members took science out to Chatham Islands children last week during a week of stargazing, exploring quantum physics and blowing stuff up! Amadeo Enriquez Ballestero, Discovery World Co-ordinator at Otago Museum spoke with Jesse Mulligan from RNZ.
DWC members recently had the pleasure of meeting Dianna Cowern, more commonly known as “Physics Girl” who was in NZ for a number of invited events. Dianna’s passion for Physics (especially quantum mechanics) and her clever and fun Youtube videos have resulted in a massive worldwide following. While in New Zealand, Dianna kindly took time out from her busy schedule for an interview with Graeme Hill from Radio Live.
Chatham Islanders could be forgiven for believing they are living largely alone, in the most easterly part of New Zealand, more than 800km from the South Island. But some visitors will be arriving there next week — a high-powered team of science outreach educators from the Otago Museum and University of Otago.
The “mini-expedition” will include museum director, physicist and astronomer Dr Ian Griffin, Dodd-Walls Centre for Photonics and Quantum Technologies director Prof David Hutchinson and museum science presentation co-ordinator Amadeo Enriquez-Ballestero. They will fly to the remote islands from Wellington on Monday and return late next week.
Prof Hutchinson and Mr Enriquez-Ballestero said they were excited about undertaking the “Extreme Science” project trip, backed by the Ministry of Business, Innovation and Employment’s Unlocking Curious Minds funding. They aimed to inspire young school pupils on the Chathams with what science and technology could already tell them about their world, and potential employment prospects. Museum science engagement director Dr Craig Grant said he also hoped the wider Chathams community “might see how new technologies can help offset some of the challenges of their remoteness, and enable them to take advantage of their unique location”, such as linking the science of astronomy with night sky watching and “astrophotography” tourism.
Prof Hutchinson, of Otago University, stressed the expedition aimed “to build a relationship”, and the funding included support for one of the teachers on the Chathams “to visit us back here at the university”.
A telescope and seismometer would be taken to the Chathams and left behind with other science equipment. The legacy was important, he said. The team viewed this “as the start of a long relationship, not a one-off visit that is then forgotten”.
Ag@Otago in collaboration with The Dodd-Walls Centre for Photonics and Quantum Technologies will host a two day workshop on Enterprise and Innovation for Postgraduate students at the University of Otago, on Wed 09 & 16 August. The workshop will be led by Dr Chris Kirk, Univentures Ltd, who has considerable expertise in this area.
Six places are available for Postgraduate students, whose research is aligned with the Ag@Otago Research Theme. Anybody who is interested in attending these workshops should contact Emeritus Professor Frank Griffin, Director Ag@Otago: email@example.com for further details.
The workshop will identify ways that your scientific discoveries and ideas can be translated into practical outcomes. Details of the overall structure of an Enterprise and Innovation workshop programme will be made available to interested participants on request.
Observing non-repetitive and statistically rare signals that occur on short timescales requires fast real-time measurements that exceed the speed, precision and record length of conventional digitizers. DWC Principal Investigator Neil Broderick and collaborators have written a paper on Time Stretch and its applications in Nature Photonics (in PDF format).
The Dodd-Walls Centre and the MacDiarmid Institute connected their top scientists with some of New Zealand’s most innovative companies to showcase what they could do for them. The Interface Industry Challenge was launched late last year asking companies to come up with commercial problems they couldn’t solve within their own technological capability, which the Centres of Research Excellence (CoREs) would help solve for free.
The CoREs are virtual institutions that draw on the talent of top scientists from anywhere in the country in a particular research area. The Dodd-Walls Centre specialises in photonic and quantum technologies while the MacDiarmid Institute focuses on materials science and nanotechnology. Having signed non-disclosure agreements, the two CoREs are working on proofs of concept to solve problems for seven companies they’ve matched to various scientists. The scientists are now starting to produce some solutions the companies can use as a competitive advantage, and in some cases may even lead to new intellectual property.
The directors of both institutes, Professor David Hutchinson from the DWC and MacDiarmid’s Professor Thomas Nann say New Zealand industry needs to keep innovating to stay ahead. The challenge was a fun way of letting companies know what scientific help they could tap into, and both CoREs hope funding the initial research now will benefit them with longer-term research partnerships. The seven companies involved range from larger companies such as Fisher & Paykel Healthcare and Buckley Systems to start-ups Avertana, Lanaco, Aquafortus Technologies and Invisi Shield.
Andy West, a director on the boards of Aquafortus and Lanaco, says it is unusual to get free research from CoREs and that’s helpful for both companies he’s helping govern which are still at the stage of “burning capital and are yet to enter full revenue profitability,” although Lanaco is close. Lanaco is a materials science company that uses fine wood blended with synthetic fibres to produce what it dubs as the world’s most breathable air filter, while Aquafortus Technologies is developing water extraction technology involving organic chemistry which could potentially extract water from liquid waste materials and help desalination. “We have access to some extremely clever people across a range of universities as CoREs are not normally in just one site – they draw the best people from around the country in any given field. And we have access to really expensive scientific equipment we couldn’t afford ourselves,“ Dr West says.
DWC Associate Investigator Dr Justin Hodgkiss recently talked to Kathryn Ryan at Radio New Zealand about the Interface Challenge and the benefits to New Zealand when scientists and businesses collaborate – listen to the interview
The Dodd-Walls Centre is thrilled to announce that Harald Schwefel was awarded winner of the Quantel Laser: Bright Ideas Competition at the 2017 CLEO Laser Science to Photonic Applications event in San Jose. Having reached the final round of four entrants, Harald presented to the Panel at CLEO, and was delighted to win the competition and receive US$30,000 of laser equipment. Congratulations Harald!
DWC Investigator Dr Maarten Hoogerland was a contributing author of the following article recently published in Optica.
Large-scale quantum networks could allow a wide variety of applications in quantum computing and simulation. We have demonstrated the operation of a single node for use in such a network. A fiber ring cavity contains a nanofiber section, which mediates atom–light interactions through the evanescent field. We observe collective enhancement of the coupling rate between the ensemble of atoms and the light in the fiber.
This work, published in “Optica”, represents an important step toward implementing such a large-scale all-fiber quantum network.
Extreme hydrothermal conditions at an active plate-bounding fault; DWC Investigator, Professor Neil Broderick, is among a group of scientists who have recently had their paper published in “Nature”.
Extremely high temperatures and fluid pressures have been measured in a borehole in the Alpine Fault in New Zealand, a Nature paper reports. The fault is expected to rupture in a magnitude-8 earthquake in the next few decades and the study could have broad implications for understanding earthquakes and fault zone geology.
The Alpine Fault is a major plate boundary fault that runs most of the length of New Zealand’s South Island. The fault produces large earthquakes approximately every 300 years, and it last ruptured in 1717. Rupert Sutherland and colleagues drilled a scientific borehole into the fault to examine the hydrothermal conditions therein.
They collected comprehensive rock, mud and seismological observations and found that temperatures and fluid pressures in the borehole were much higher than expected, particularly in the ‘hanging wall’ above the fault, where the average temperature gradient reached around 125 degrees Celsius per kilometre of depth. Values above 80 degrees Celsius per kilometre tend to be associated with volcanic regions, but there is no evidence for volcanism near this site. The authors conclude that these extreme hydrothermal conditions result from rapid fault movement, which transports rock and heat from greater depths, and fluid movement through fractured rocks, which concentrates heat into valleys.
The workshop PDNOC-2 is the second part of a tandem workshop on Pattern Dynamics in Nonlinear Optical Cavities organised by the Max Planck Institute for the Physics of Complex Systems in Dresden in collaboration with the Dodd-Walls Centre for Photonics and Quantum Technologies (DWC) and the New Zealand Institute for Advanced Study (NZIAS). PDNOC-2, which will take place in Auckland in the period 6-16 June 2017, will focus on the dynamics of patterns in different semiconductor cavities, in fiber laser setups and in materials with nonlinear optical properties.
The equipment Dr Mikkel Andersen and fellow researchers have developed to control individual atoms looks like the stuff of historic science fiction. There are seven lasers and a host of other scientific apparatus in a large machine, and when one researcher let a wire fall in front of a powerful laser it promptly began to smoke in a slightly alarming manner. But the equipment in a lab in a University of Otago science block has helped Dr Andersen and his team do what has not been done before; control individual atoms, making them appear wherever they want them to.
Dunedin-based Photonic Innovations has acquired complementary gas detection technology that makes workplaces such as meat processing companies and cool stores safer. The technology was acquired from Auckland company Southern Photonics. Both companies use lasers for detecting gases instead of chemical sensors, which were part of the safety problem at Pike River mine. Photonic Innovation chief executive Dr Ojas Mahapatra said lasers are more reliable and cheaper to operate.
To celebrate the annual United Nations International Day of Women and Girls in Science, Otago Museum, in collaboration with the Dodd Walls Centre of Research Excellence, is hosting a group of Year 11 Otago students this Friday 10 February for a behind-the-scene visit at the Museum. The student’s tour will include a visit to the Museum’s Collection and Conservation labs, Discovery World Tropical Forest, and will finish with a Women in Science panel discussion and question and answer session.
The panel will consist of female staff members from both the Museum and the University of Otago who trained in science and are now involved in a wide range of activities, from researching climate change in Antarctica, to taxidermy, to caring for thousands of butterflies in Australasia’s only three-level live butterfly house. This includes Bianca Sawyer (Physics), Alison Heather (Physiology), Lisa Craw (Geology) and Nysa Mildwaters (Otago Museum).
Nathalie Wierdak, Otago Museum Outreach Coordinator, is pleased that the Museum and the Dodd Wall Centre are be able to offer this event to female students in the region. “This week’s event is an exciting one – not only does it mark a significant date in our science calendar, it once again highlights the importance of encouraging females of all ages to pursue a career in science,” says Wierdak
Prof Bernd Krauskopf reports that the Sixth Annual Meeting of ANZAMP, hosted by the Department of Mathematics of the University of Auckland, was held earlier in 2018. Sponsored by the DWC, this was the first time this conference was hosted in New Zealand, providing an excellent opportunity to showcase NZ’s varied research activities in mathematical physics.
Nobel Laureate, Professor Bill Philips, Professor Ian Walmsley and University of Otago and Dodd-Walls Centre PhD student, Bianca Sawyer were interviewed by TVNZ whilst attending the 10th Annual Symposium of the Dodd Walls Centre.
Matthew McGoverin moved on after completing his PhD in Science under DWC Investigator, Dr Mikkel Andersen to be come a teacher at Havelock North High School. Matthew has won the prestigious Woolf Fisher Fellowship Award. Congratulations on such a wonderful achievement Matthew from all of us here at the Dodd Walls Centre!