Visible-band chiroptical meta-devices with phase-change adjusted optical chirality

Zhang, L., Gao, K., Lu, F., Xu, L. ORCID: 0000-0001-9071-4311, Rahmani, M. ORCID: 0000-0001-9268-4793, Sun, L., Gao, F., Zhang, W. and Mei, T., 2022. Visible-band chiroptical meta-devices with phase-change adjusted optical chirality. Nano Letters. ISSN 1530-6984

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Low-cost large-area chirality meta-devices (CMDs) with adjustable optical chirality are of great interest for polarization-sensitive imaging, stereoscopic display, enantioselectivity analysis, and catalysis. Currently, CMDs with adjusted chiroptical responses in the mid-infrared to terahertz band have been demonstrated by exploiting photocarriers of silicon, pressure, and phase-change of GSTs but are still absent in the visible band, which in turn limits the development of chiral nanophotonic devices. Herein, by employing a phase-change material (Sb2S3), we present a protocol for the fabrication of wafer-scale visible-band enantiomeric CMDs with handedness, spectral, and polarization adjustability. As measured by circular dichroism, the chirality signs of CMDs enantiomers can be adjusted with Sb2S3 from amorphous to crystalline, and the chirality resonance wavelength can also be adjusted. Our results suggest a new type of meta-devices with adjustable chiroptical responses that may potentially enable a wide range of chirality nanophotonic applications including highly sensitive sensing and surface-enhanced nanospectroscopy.

Item Type: Journal article
Publication Title: Nano Letters
Creators: Zhang, L., Gao, K., Lu, F., Xu, L., Rahmani, M., Sun, L., Gao, F., Zhang, W. and Mei, T.
Publisher: American Chemical Society (ACS)
Date: 16 September 2022
ISSN: 1530-6984
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © 2022 American Chemical Society after peer review and technical editing by the publisher.
Divisions: Schools > School of Science and Technology
Record created by: Linda Sullivan
Date Added: 22 Sep 2022 11:36
Last Modified: 16 Sep 2023 03:00

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