| TYPE | Solid State Institute Seminar |
| Speaker: | Prof. Dr. Chun-Chieh Chang |
| Affiliation: | Los Alamos National Laboratory/ National Taiwan Normal University |
| Date: | 13.01.2021 |
| Time: | 12:30 - 13:30 |
| Location | Zoom LINK |
| Remark: | Host: Assistant Professor Yoav Sagi |
| Presentation: |  |
| Abstract: | Metasurfaces have shown their unprecedented capability to manipulate the amplitude, phase, and polarization state
of the electromagnetic wave, demonstrating various exotic optical phenomena and novel functionalities for a wide
variety of applications such as wave-front engineering, enhanced light-matter interaction at nanoscale, and chemica
l and biological sensing, to name a few. In this talk, the focus will be first placed upon my recent work on few-laye
r metasurfaces for manipulating the terahertz (THz) wave to realize linear-to-circular polarization conversion, optic
al antireflection, narrowband filtering, and beam focusing, with unprecedentedly high efficiencies promising for pr
actical applications where compact, high-performance THz photonic components and devices are desired. Then, I
will switch gears to talk about my work on high-temperature nanophotonics, in which refractory metasurfaces for s
olar thermophotovoltaics (STPV) with desirable tailored absorptance and emittance are experimentally demonstrat
ed, featuring thermal stability up to at least 1200 °C and a projected STPV efficiency of 18% when a fully integrate
d absorber/emitter refractory metasurface intermediate structure is employed. |