Active control of polarization-dependent near-field coupling in hybrid metasurfaces
- Tianjin Univ. and the Key Lab. of Optoelectronics Information and Technology (Ministry of Education) (China)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Tianjin Univ. and the Key Lab. of Optoelectronics Information and Technology (Ministry of Education) (China); Oklahoma State Univ., Stillwater, OK (United States)
We introduce experimental findings of actively controlled anisotropic near-field coupling in a metamaterial composed of two concentric in-plane split ring resonators and a closed-ring resonator functioning at terahertz (THz) frequencies. Transparency windows are determined due to the coupling effect between two dipole-like modes for both polarizations of the THz field, but at different frequencies. By properly incorporating silicon islands into the metamaterial unit cells, the transparency windows can be optically controlled with a modulation depth reaching 68% and 62% for horizontal and vertical polarizations, respectively. The results are of value for designing active THz anisotropic devices.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES); National Key Basic Research Program of China; National Science Foundation of China (NSFC)
- Grant/Contract Number:
- 89233218CNA000001
- OSTI ID:
- 1561075
- Report Number(s):
- LA-UR-18-29890; TRN: US2000583
- Journal Information:
- Applied Physics Letters, Vol. 113, Issue 6; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 22 works
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