Full-Stokes Polarization Perfect Absorption with Diatomic Metasurfaces

Date

2021

Authors

Liang, Yao
Lin, Han
Koshelev, Kirill
Zhang, Fengchun
Yang, Yunyi
Wu, Jiayang
Kivshar, Yuri
Jia, Baohua

Journal Title

Journal ISSN

Volume Title

Publisher

American Chemical Society

Abstract

Metamaterial-based perfect absorbers provide efficient ways for selective absorption of light with both linear or circular polarizations. Perfect absorption for an arbitrary polarization requires the development of subwavelength structures absorbing efficiently elliptically polarized light, but they remain largely unexplored. Here, we design and realize experimentally novel plasmonic metasurfaces for full-Stokes polarization perfect absorption in the mid-infrared. The metasurface unit cell consists of coupled anisotropic meta-atoms forming a diatomic metamolecule. The designed plasmonic metastructures provide a strong field enhancement by at least 1 order of magnitude higher than conventional perfect absorbers. In experiment, our plasmonic metasurfaces demonstrate sharp differentiation of spectral responses for an arbitrary pair of orthogonal polarization states (linear, circular, or elliptical) providing perfect absorption for one polarization with strong reflection for its counterpart. Our results suggest a novel route for efficient control of light polarization in metasurfaces offering numerous potential applications ranging from thermal imaging to chiral molecule detection.

Description

Keywords

Plasmonic metasurfaces, perfect absorption, full-Stokes polarimetry, field enhancement

Citation

Source

Nano Letters

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1021/acs.nanolett.0c04456

Restricted until

2099-12-31