2022年5月11日
Dynamic inversion of planar-chiral response of terahertz metasurface based on critical transition of checkerboard structures
Nanophotonics
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- 巻
- 11
- 号
- 9
- 開始ページ
- 2057
- 終了ページ
- 2064
- 記述言語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1515/nanoph-2021-0671
- 出版者・発行元
- Walter de Gruyter GmbH
Abstract
Dynamic inversion of the planar-chiral responses of a metasurface is experimentally demonstrated in the terahertz regime. To realize this inversion, the critical transition of the checkerboard-like metallic structures is used. Resonant structures with planar chirality and their complementary enantiomeric patterns are embedded in the checkerboard. Using vanadium dioxide as a variable resistance, the metasurface is implemented in the terahertz regime. The responses of the metasurface to circularly polarized waves are then characterized by terahertz time-domain spectroscopy. Further, the sign of the circular conversion dichroism, which is closely related to the handedness of the planar chirality of the metasurface, is observed to be inverted at 0.64 THz by varying the temperature. Such invertible planar-chiral responses can be applied practically to the handedness-invertible chiral mirrors.
Dynamic inversion of the planar-chiral responses of a metasurface is experimentally demonstrated in the terahertz regime. To realize this inversion, the critical transition of the checkerboard-like metallic structures is used. Resonant structures with planar chirality and their complementary enantiomeric patterns are embedded in the checkerboard. Using vanadium dioxide as a variable resistance, the metasurface is implemented in the terahertz regime. The responses of the metasurface to circularly polarized waves are then characterized by terahertz time-domain spectroscopy. Further, the sign of the circular conversion dichroism, which is closely related to the handedness of the planar chirality of the metasurface, is observed to be inverted at 0.64 THz by varying the temperature. Such invertible planar-chiral responses can be applied practically to the handedness-invertible chiral mirrors.
- リンク情報
- ID情報
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- DOI : 10.1515/nanoph-2021-0671
- ISSN : 2192-8606
- eISSN : 2192-8614
- ORCIDのPut Code : 106048946