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Negative refraction in twisted hyperbolic metasurfaces

Authors :
Liu Yi
Ouyang Chunmei
Xu Quan
Su Xiaoqiang
Ma Jiajun
Zhao Jing
Li Yanfeng
Tian Zhen
Gu Jianqiang
Liu Liyuan
Han Jiaguang
Zhang Weili
Source :
Nanophotonics, Vol 11, Iss 9, Pp 1977-1987 (2021)
Publication Year :
2021
Publisher :
De Gruyter, 2021.

Abstract

Hyperbolic metasurfaces with unique dispersion properties can manipulate light–matter interactions according to the demands. However, due to their inherent physical properties, topological transitions (flat bands) exist only in the orthogonal directions, which greatly limit their application. Here, we unveil rich dispersion engineering and topological transitions in hyperbolic metasurfaces. Based on the effective medium theory, the rotation matrix is introduced into the dispersion relation to explain the distorted energy band diagrams, iso-frequency contours and higher-order multi-dipoles of the novel twisted metasurfaces, thereby forming multi-directional topological transitions and surface plasmon polariton propagation. Furthermore, we develop an integrated model to realize new dual-channel negative refraction and nondiffraction negative refraction. The phenomena observed in the experiments match well with the simulations, which proves that the designed metasurfaces make new types of negative refraction possible and will help to overcome the diffraction limit. The hyperbolic metasurfaces presented here exhibit exceptional capabilities for designing microscopes with a super lens at the molecular level, concealment of military aircraft, invisibility cloaks and other photonic devices with higher transmission efficiency.

Details

Language :
English
ISSN :
21928614
Volume :
11
Issue :
9
Database :
Directory of Open Access Journals
Journal :
Nanophotonics
Publication Type :
Academic Journal
Accession number :
edsdoj.74f503777f334bbb90a38fdce3477ece
Document Type :
article
Full Text :
https://doi.org/10.1515/nanoph-2021-0561