Abstract

Chirality plays an essential role in the fields of biology, medicine and physics. However, natural materials exhibit very weak chiroptical response. In this paper, near-infrared chiral plasmonic metasurface absorbers are demonstrated to selectively absorb either the left-handed or right-handed circularly polarized light for achieving large circular dichroism (CD) across the wavelength range from 1.3 µm to 1.8 µm. It is shown that the maximum chiral absorption can reach to 0.87 and that the maximum CD in absorption is around 0.70. The current chiral metasurface design is able to achieve strong chiroptical response, which also leads to high thermal CD for the local temperature increase. The high-contrast reflective chiral images are also realized with the designed metasurface absorbers. The demonstrated chiral metasurface absorbers can be applied in many areas, such as optical filters, thermal energy harvesting, optical communication, and chiral imaging.

Department(s)

Mechanical and Aerospace Engineering

Comments

National Science Foundation (NSF) (DMR-1552871, ECCS-1653032); Office of Naval Research (ONR) (N00014-16-1-2408); U.S. Department of Energy, Office of Science (Contract No. DE-AC02-06CH11357)

Keywords and Phrases

Dichroism; Energy harvesting; Optical communication; Plasmonics; Plasmons; Chiral absorption; Circularly polarized light; High contrast; High thermal; Local temperature; Natural materials; Near Infrared; Wavelength ranges; Infrared devices

International Standard Serial Number (ISSN)

1094-4087

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2018 Optical Society of America (OSA), All rights reserved.

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