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- Title
Dual-band dichroic asymmetric transmission of linearly polarized waves in terahertz chiral metamaterial.
- Authors
Lv, Tingting; Chen, Xieyu; Dong, Guohua; Liu, Meng; Liu, Dongming; Ouyang, Chunmei; Zhu, Zheng; Li, Yuxiang; Guan, Chunying; Han, Jiaguang; Zhang, Weili; Zhang, Shuang; Shi, Jinhui
- Abstract
Polarization conversion dichroism is of particular interest in manipulating the polarization state of light, whereas high-performance asymmetric transmission (AT) of linearly polarized waves is still inaccessible in the terahertz range. Here, a bilayer chiral metamaterial consisting of orthogonally chained S-shaped patterns with broken symmetry along the light propagation direction is proposed and demonstrated experimentally to realize a dual-band dichroic AT effect for linearly polarized terahertz waves. The AT effects are robust across a wide range of incident angles. The observed strong AT can be theoretically explained by a multiple reflection and transmission interference model and the transfer matrix method. The proposed bilayer chiral metamaterial may have broad applications in polarization manipulation, chiral biosensing and direction-dependent information processing.
- Subjects
TERAHERTZ materials; OPTICAL polarization; LIGHT propagation; SYMMETRY breaking; TRANSFER matrix; SUBMILLIMETER waves; DICHROISM
- Publication
Nanophotonics (21928606), 2020, Vol 9, Issue 10, p3235
- ISSN
2192-8606
- Publication type
Article
- DOI
10.1515/nanoph-2019-0507