Manipulating the Chirality of Moiré Metasurface by Symmetry Breaking

Lyu，Bokun1; Li，Yang2,3; Jia，Qianwen1; Li，Haojie1; Yang，Guoxia1; Cao，Fengzhao1; Kou，Supeng1; Liu，Dahe1; Cao，Tun3; Li，Guixin2; Shi，Jinwei1

2023

10.1002/lpor.202201004

Laser and Photonics Reviews   影响因子和分区

1863-8880

1863-8899

The chirality of materials is of great significance in many fields. Metasurfaces with chirality have attracted great attention in the past decades because of their ability to miniaturize the device into the nanoscale. An important class of chiral metasurfaces is the Moiré pattern assembled by two layers of metasurfaces. However, Moiré metasurfaces usually have limited circular dichroism. Here, the origin and the limiting factor of the chirality of Moiré metasurfaces using the chiral coupled oscillator model is analyzed. It is demonstrated that, with the help of a non-Hermitian Hamiltonian, the chirality can be improved by breaking the symmetry in the positive and negative k directions. The best result is achieved when both the two components have lowest transmission. In addition, the chiral anisotropy of a Moiré metasurface in full momentum space is studied, and it is shown that the chirality can be further improved in certain directions. The chiral anisotropy of Moiré metasurfaces may be used in applications such as optical information storage, structured color, unidirectional light coupling, sensitive chiral sensors, chiral nonlinear optics, chiral lasers, and Bose–Einstein condensation.

chirality metasurfaces non-Hermitian plasmonics

SCI ; EI

英语

通讯

National Natural Science Foundation of China["11774035","91950114","12161141010"] ; Guangdong Provincial Innovation and Entrepreneurship Project[91950108] ; null[2017ZT07C071] ; null[12174031]

Optics ; Physics

Optics ; Physics, Applied ; Physics, Condensed Matter

WOS:000986366200001

WILEY-V C H VERLAG GMBH

20232014089753

Anisotropy ; Dichroism ; Nonlinear optics ; Oscillators (mechanical)

Mechanical Devices:601.1 ; Light/Optics:741.1 ; Nonlinear Optics:741.1.1 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Atomic and Molecular Physics:931.3

2-s2.0-85159089411

Scopus

1.Department of Physics and Applied Optics Beijing Area Major Laboratory,Beijing Normal University,Beijing,100875,China
2.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.School of Optoelectronics Engineering and Instrumentation Science,Dalian University of Technology,Dalian,116024,China

Lyu，Bokun,Li，Yang,Jia，Qianwen,et al. Manipulating the Chirality of Moiré Metasurface by Symmetry Breaking[J]. Laser and Photonics Reviews,2023,17(7).

Lyu，Bokun.,Li，Yang.,Jia，Qianwen.,Li，Haojie.,Yang，Guoxia.,...&Shi，Jinwei.(2023).Manipulating the Chirality of Moiré Metasurface by Symmetry Breaking.Laser and Photonics Reviews,17(7).

Lyu，Bokun,et al."Manipulating the Chirality of Moiré Metasurface by Symmetry Breaking".Laser and Photonics Reviews 17.7(2023).