Volume 132, Number 1, October 2020
|Number of page(s)||6|
|Section||Physics of Gases, Plasmas and Electric Discharges|
|Published online||17 December 2020|
Tunable chiral-selective electromagnetically induced transparency-like effect in VO2-based metamaterial for slow light applications
1 Department of Physics, Zhejiang University of Technology - Hangzhou 310023, China
2 Collaborative Innovation Center for Bio- Med Physics Information Technology of ZJUT, Zhejiang University of Technology - Hangzhou 310023, China
3 Laboratoire Hubert Curien, UMR CNRS 5516/UJM/University of Lyon - 42000 Saint- Etienne, France
Received: 1 July 2020
Accepted: 6 September 2020
A chiral metamaterial based on vanadium dioxide (VO2) is proposed to realize the ultrafast active control of an electromagnetically induced transparency-like (EIT-like) effect. The design of the tunable metamaterial is based on the heat-induced insulator-to-metal transition of VO2 and a tunable transmission peak with circular polarization selectivity is achieved. For the right circular polarization (RCP) laser incidence, the sharp EIT-like peak is generated and rises with the increasing signal powers, which has not happened in the left circular polarization (LCP) incident condition. The spin-dependent phenomenon in time domain is also observed and the slow light effect in the metamaterial yields a tunable time delay up to 4 ns. Therefore, the tunable EIT-like effect with chiral selectivity is presented and highlights its practical applications in programmable metamaterial regions and slow light devices, etc.
PACS: 52.40.Db – Electromagnetic (nonlaser) radiation interactions with plasma / 42.25.Bs – Wave propagation, transmission and absorption / 71.30.+h – Metal-insulator transitions and other electronic transitions
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