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Title: Dual-band selective circular dichroism in mid-infrared chiral metasurfaces

Abstract

Most chiral metamaterials and metasurfaces are designed to operate in a single wavelength band and with a certain circular dichroism (CD) value. Here, mid-infrared chiral metasurface absorbers with selective CD in dual-wavelength bands are designed and demonstrated. The dual-band CD selectivity and tunability in the chiral metasurface absorbers are enabled by the unique design of a unit cell with two coupled rectangular bars. It is shown that the sign of CD in each wavelength band can be independently controlled and flipped by simply adjusting the geometric parameters, the width and the length, of the vertical rectangular bars. The mechanism of the dual-band CD selection in the chiral metasurface absorber is further revealed by studying the electric field and magnetic field distributions of the antibonding and bonding modes supported in the coupled bars under circularly polarized incident light. Furthermore, the chiral resonance wavelength can be continuously increased by scaling up the geometric parameters of the metasurface unit cell. The demonstrated results will contribute to the advance of future mid-infrared applications such as chiral molecular sensing, thermophotovoltaics, and optical communication.

Authors:
ORCiD logo; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Science Foundation (NSF); USDOE Office of Science (SC)
OSTI Identifier:
1869040
Alternate Identifier(s):
OSTI ID: 1906185
Grant/Contract Number:  
AC02-06CH11357; DMR-1552871; ECCS-1653032
Resource Type:
Published Article
Journal Name:
Optics Express
Additional Journal Information:
Journal Name: Optics Express Journal Volume: 30 Journal Issue: 11; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Tang, Haotian, Rosenmann, Daniel, Czaplewski, David A., Yang, Xiaodong, and Gao, Jie. Dual-band selective circular dichroism in mid-infrared chiral metasurfaces. United States: N. p., 2022. Web. doi:10.1364/OE.457218.
Tang, Haotian, Rosenmann, Daniel, Czaplewski, David A., Yang, Xiaodong, & Gao, Jie. Dual-band selective circular dichroism in mid-infrared chiral metasurfaces. United States. https://doi.org/10.1364/OE.457218
Tang, Haotian, Rosenmann, Daniel, Czaplewski, David A., Yang, Xiaodong, and Gao, Jie. Fri . "Dual-band selective circular dichroism in mid-infrared chiral metasurfaces". United States. https://doi.org/10.1364/OE.457218.
@article{osti_1869040,
title = {Dual-band selective circular dichroism in mid-infrared chiral metasurfaces},
author = {Tang, Haotian and Rosenmann, Daniel and Czaplewski, David A. and Yang, Xiaodong and Gao, Jie},
abstractNote = {Most chiral metamaterials and metasurfaces are designed to operate in a single wavelength band and with a certain circular dichroism (CD) value. Here, mid-infrared chiral metasurface absorbers with selective CD in dual-wavelength bands are designed and demonstrated. The dual-band CD selectivity and tunability in the chiral metasurface absorbers are enabled by the unique design of a unit cell with two coupled rectangular bars. It is shown that the sign of CD in each wavelength band can be independently controlled and flipped by simply adjusting the geometric parameters, the width and the length, of the vertical rectangular bars. The mechanism of the dual-band CD selection in the chiral metasurface absorber is further revealed by studying the electric field and magnetic field distributions of the antibonding and bonding modes supported in the coupled bars under circularly polarized incident light. Furthermore, the chiral resonance wavelength can be continuously increased by scaling up the geometric parameters of the metasurface unit cell. The demonstrated results will contribute to the advance of future mid-infrared applications such as chiral molecular sensing, thermophotovoltaics, and optical communication.},
doi = {10.1364/OE.457218},
journal = {Optics Express},
number = 11,
volume = 30,
place = {United States},
year = {Fri May 20 00:00:00 EDT 2022},
month = {Fri May 20 00:00:00 EDT 2022}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1364/OE.457218

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