Meta-Optics for night vision technologies
| Dates: | 9 December 2020 |
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| Times: | 10:00 - 11:00 |
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| What is it: | Seminar |
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| Organiser: | Photon Science Institute |
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| Who is it for: | University staff, Current University students |
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| Speaker: | Professor Dragomir Neshev |
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Join us for this PSI seminar with guest speaker Professor Dragomir Neshev.
In this talk, Professor Neshev will introduce the recently established Australian Centre of Excellence for Transformative Meta-Optical Systems (TMOS). The Centre aims to create smart and miniaturized optical technologies with functionalities not possible to date. This will be achieved by the research and development of nanostructured materials that can actively generate, manipulate and detect light. As a part of the Centre’s research program, Professor Neshev will further present some examples of his current research activities, including a novel detection of infrared light based on nonlinear up-conversion from infrared to visible in dielectric metasurfaces.
Dielectric metasurfaces have recently shown to be excellent candidates for efficient frequency mixing at the nanoscale due to the excitation of Mie-type resonances. Among different dielectric materials, III-V semiconductor-based nanostructures, such as GaAs have enabled high-efficiency second-order nonlinear mixing due to their high quadratic nonlinear susceptibility. The process of sum-frequency generation in GaAs-based metasurfaces can thus be utilized for efficient frequency up-conversion, opening new opportunities for nonlinear imaging and infrared vision not possible before. We demonstrate that the nonlinear mixing process generates visible images that can be time-resolved with femtosecond resolution enabling spatial imaging of ultrafast processes. Importantly, the up-conversion process is achieved with high efficiency, allowing for imaging on a conventional CMOS imaging sensor. His results open new opportunities for the development of compact night-vision devices operating at room temperature.
This event will be taking place online and more details of the event how to join will be made available shortly.
Speaker
Professor Dragomir Neshev
Organisation: Australian National University
Biography: Dragomir Neshev is a Professor in Physics at the Australian National University (ANU) and the Director of the Australian Research Council Centre of Excellence for Transformative Meta-Optical Systems (TMOS). He received the Ph.D. degree from Sofia University, Bulgaria in 1999. Since then he has worked in the field of optics at several research centres around the world and joint the ANU in 2002. He is the recipient of a number of awards, including a Queen Elizabeth II Fellowship (2010); an Australian Research Fellowship (2004) and a Marie-Curie Individual Fellowship (2001). His activities span over several branches of optics, including periodic photonic structures, singular optics, plasmonics, and optical metasurfaces.
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This event will take place online
