[Nbp] Talk on dielectric metasurfaces and flat optics by Arseniy Kuznetsov tomorrow 1-2 pm!

[Mikael Käll]

Place: Raven & Fox, 5th floor Fysik Forskarhus, middle corridor

Please spread the word to anyone you think would be interested, and sorry for late notification!

Mikael


Title: Passive and tunable flat optics with dielectric nanoantennas



Abstract:

Dielectric nanoantennas and metasurfaces have recently emerged as a new nanophotonic platform paving way to new generation of flat optical components. They can control light at nanometer dimensions in an unprecedented fashion, not achievable by conventional bulk optics. This led to demonstrations of flat optics with extraordinary performance, e.g. very large numerical aperture or very large field of view. One of the existing challenges of metasurface-based flat optics is strong grating-like dispersion of metasurfaces, which typically limits their ability to perform high-quality imaging in a broad spectral range, e.g., with white light. In this talk, I will first show how combining a few large-field of view quadratic metalenses with image processing it is possible to achieve white-light wide-field-of-view imaging potentially applicable to regular smartphones or laptops. On the other hand, I will also demonstrate that the metasurface dispersion can be used in a constructive way to achieve hyperspectral imaging systems for space applications. I will then demonstrate that integrating these nanoantennas on top of actively controlled 1D and 2D electrode arrays embedded in liquid crystals it is possible to achieve fully controllable and dynamically switchable metasurfaces with a pixel size down to 1 micrometer. These metasurface-based spatial light modulators can generate arbitrary wavefront patterns and can be used for beam steering in LiDAR devices or tunable holography in 3D holographic displays.



Bio:

Arseniy Kuznetsov received his double PhD degree from University Paris 13 (France) in 2005 and from Institute of Applied Physics RAS (Russia) in 2006. Since 2007 till 2011 he worked at the Laser Zentrum Hannover (Germany) as Humboldt Research Fellow. Since October 2011 till now he has been working in A*STAR, Singapore first in the Data Storage Institute and now in the Institute of Materials Research and Engineering. He is currently appointed as Senior Principal Scientist II, Director of Nanoantenna-SLM and Nanoantenna-LED Programs and Head of Advanced Optical Technologies Department. Current activities of his group are devoted to development of novel nanodevices based on dielectric nanoantennas and metasurfaces. He is an author of >90 journal papers (incl. Science, Nature Nanotechnology etc.) and a co-inventor of >20 filed patent applications. For his pioneering research on optically resonant dielectric nanostructures and dielectric nanoantennas, he was awarded 2016 IET A F Harvey Engineering Research Prize, 2017 NRF Investigatorship Award and 2020 IPS World Scientific Physics Research Medal and Prize. In 2020 he was also elected to be an Optica Fellow and in 2023 an A*STAR Fellow.



Professor Mikael Käll
Group leader Bionanophotonics,
Mail address: Department of Physics, Nano and Biophysics, Chalmers University of Technology, S412 96 Goteborg, Sweden
Visiting addres: Fysikgränd 3, level 6, room F6117, Chalmers Tekniska Högskola
Phone: +46-(0)31-7723119
Home pages:
<http://www.chalmers.se/en/staff/Pages/Mikael-K%C3%A4ll.aspx>https://research.chalmers.se/en/person/?cid=kall
<http://www.chalmers.se/en/departments/physics/research/Nano_Biophysics/Pages/KallGroup.aspx>https://www.chalmers.se/en/departments/physics/research/nano-and-biophysics/kall-group/


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Från: NBP <nbp-bounces at lists.chalmers.se> för Pantea Dara <pantea.dara at chalmers.se>
Skickat: den 1 september 2023 08:34
Till: nbp at lists.chalmers.se
Ämne: [Nbp] Check out


Hello everyone,



We hope that you have enjoyed the kick-off so far. You can check out from the hotel until 11:00. If you have no extra payments, you can give your keys to the reception in the Villa Apelviken (Where we meet for the talks). If you need to pay for something, then you should give your keys to the main reception and do the payment there.

Please let us know if you have any questions.



Wish you all the best,

The organisation committee


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