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.
L. Ouyang et al., "Near-Infrared Chiral Plasmonic Metasurface Absorbers," Optics Express, vol. 26, no. 24, pp. 31484-31489, Optical Society of America (OSA), Nov 2018.
The definitive version is available at https://doi.org/10.1364/OE.26.031484
Mechanical and Aerospace Engineering
Intelligent Systems Center
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)
Article - Journal
© 2018 Optical Society of America (OSA), All rights reserved.
01 Nov 2018