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Title: Chiral plasmonic metasurface absorbers in the mid-infrared wavelength range

Journal Article · · Optics Letters
DOI:https://doi.org/10.1364/ol.404192· OSTI ID:1757969
 [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

Chiral metamaterials in the mid-infrared wavelength range have tremendous potential for studying thermal emission manipulation and molecular vibration sensing. In this work, we present one type of chiral plasmonic metasurface absorber with high circular dichroism (CD) in absorption of more than 0.56 across the mid-infrared wavelength range of 5-5.5 mu m. The demonstrated chiral metasurface absorbers exhibit a maximum chiral absorption of 0.87 and a maximum CD in absorption of around 0.60. By adjusting the geometric parameters of the unit cell structure of the metasurface, the chiral absorption peak can be shifted to different wavelengths. Due to the strong chiroptical response, the thermal analysis of the designed chiral metasurface absorber further shows the large temperature difference between the left-handed and right-handed circularly polarized light. The demonstrated results can be utilized in various applications such as molecular detection, mid-infrared filter, thermal emission, and chiral imaging.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; National Science Foundation (NSF); US Department of the Navy, Office of Naval Research (ONR)
Grant/Contract Number:
AC02-06CH11357; DMR-1552871; ECCS-1653032; N00014-16-1-2408
OSTI ID:
1757969
Alternate ID(s):
OSTI ID: 1664516
Journal Information:
Optics Letters, Vol. 45, Issue 19; ISSN 0146-9592
Publisher:
Optical Society of America (OSA)Copyright Statement
Country of Publication:
United States
Language:
English

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