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Published on: November 21, 2019
Selective Plasmonic Responses of Chiral Metamirrors
Chang-Ruei Li1, Yu-Wei Liao2, Rashid G Bikbaev3,4
1Institute of Lighting and Energy Photonics, College of Photonics, National Yang Ming Chiao Tung University, 301 Gaofa 3rd Road, Tainan 71150, Taiwan.
Chiral metamirrors selectively reflect and absorb circularly polarized light. This study demonstrates a new nanostructure for designing advanced, compact chiral optical components.
Area of Science:
- Optics and Photonics
- Materials Science
- Nanotechnology
Background:
- Chiral metasurfaces leverage circularly polarized light for selective reflection.
- Previous work established basic functionalities, but further exploration is needed.
Purpose of the Study:
- To report enhanced functionalities of chiral metamirrors as reflectors and absorbers.
- To introduce a novel nanostructure for designing advanced chiral optical components.
Main Methods:
- Design and experimental validation of chiral metamirrors using a combined nanobrick and wire grating structure.
- Investigation of optical phenomena under circularly polarized light at normal incidence.
Main Results:
- Experimental observation of circular dichroism in reflection within the visible spectrum.
- Demonstration of high reflectance for right-handed circular polarization and strong absorption for left-handed circular polarization at resonant wavelengths.
- Validation of a new structure for demonstrating phase superposition in designing chiral metamirrors.
Conclusions:
- The designed chiral metamirrors exhibit distinct optical responses to different circular polarizations.
- The novel nanostructure facilitates effective design of chiral metamirrors and advances ultracompact optical component development.
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