Electrically reduced optical switching threshold of VO2-based THz metasurface
Vladimir E. Kaydashev, 1,
Alexander S. Slavich, 1,
Ivan K. Domaratskiy, 1,
Sergey S. Zhukov, 1,
Roman Kirtaev, 1,
Dmitry Mylnikov, 1,
Maxim E. Kutepov, 2,
Evgeni M. Kaidashev, 2
1 Moscow Institute of Physics and Technology, Dolgoprudny, Russia
2 Southern Federal University, Rostov-on-Don, Russia
Abstract
The VO2-based THz metasurface optical switching threshold is reduced by more than five orders of magnitude to 0.32-0.4 W/cm2 due to the supply of a subthreshold electric current. Moreover, additional deposition of Au nanoparticles can further reduce the threshold by 30% due to plasmonic effects. The proposed designs and a combined approach to controlling the sub-THz/THz transmission by electric current and light make it possible to overcome the existing bottleneck in design of dynamically programmable THz mirror array based on metasurfaces.
Speaker
Vladimir Kaydashev
Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology (MIPT), Institutskiy Per.9, 141701, Dolgoprudny, Russia
Russia
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