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Broadband infrared circular dichroism in chiral metasurface absorbers

Journal Article · · Nanotechnology
 [1];  [2];  [2];  [1];  [1]
  1. Missouri Univ. of Science and Technology, Rolla, MO (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials
Chirality is ubiquitous in nature and it is essential in many fields, but natural materials possess weak and narrow-band chiroptical effects. In this work, chiral plasmonic metasurface absorbers are designed and demonstrated to achieve large broadband infrared circular dichroism (CD). The broadband chiral absorber is made of multiple double-rectangle resonators with different sizes, showing strong absorption of left-handed or right-handed circularly polarized (LCP or RCP) light above 0.7 and large CD in absorption more than 0.5 covering the wavelength range from 1.35 mu m to 1.85 mu m. High broadband polarization-dependent local temperature increase is also obtained. The switchable infrared reflective chiral images are further presented by changing the wavelength and polarization of incident light. The broadband chiral metasurface absorbers promise future applications in many areas such as polarization detection, thermophotovoltaics, and chiral imaging.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); US Office of Naval Research (ONR); USDOE; USDOE Office of Science (SC)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1774620
Alternate ID(s):
OSTI ID: 1617394
OSTI ID: 23114763
Journal Information:
Nanotechnology, Journal Name: Nanotechnology Journal Issue: 29 Vol. 31; ISSN 0957-4484
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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