Wavelength-Selective Infrared Metasurface Absorber for Multispectral Thermal Detection

A wavelength-selective metasurface absorber suitable for use in multispectral microbolometer focal plane arrays in the long-wavelength infrared (LWIR) region is theoretically and experimentally investigated. We show that a thin metal metasurface, which is characterized by effective surface impedance...

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Bibliographic Details
Published in:IEEE photonics journal 2015-12, Vol.7 (6), p.1-10
Main Authors: Joo-Yun Jung, Jihye Lee, Dae-Geun Choi, Jun-Hyuk Choi, Jun-Ho Jeong, Eung-Sug Lee, Neikirk, Dean P.
Format: Article
Language:English
Subjects:
Absorption
Asymmetry
Dielectrics
Focal plane
Holes
Infrared
Infrared detectors
Metamaterials
Multilayers
Narrowband
Spectra
subwavelength structures
Surface impedance
Thermal IR detectors
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Summary:A wavelength-selective metasurface absorber suitable for use in multispectral microbolometer focal plane arrays in the long-wavelength infrared (LWIR) region is theoretically and experimentally investigated. We show that a thin metal metasurface, which is characterized by effective surface impedance, as an absorbing layer can be integrated with an asymmetric Fabry-Pérot cavity to construct a wavelength-selective perfect absorber. The absorbed infrared energy is mainly dissipated in a thin metal metasurface, in contrast to a multilayer metamaterial absorber. The calculated and experimental spectral responses of the metasurface absorbers show excellent wavelength-selective narrowband absorption to allow multispectral imaging in LWIR.
ISSN:1943-0655
1943-0647
DOI:10.1109/JPHOT.2015.2504975