Grating-type infrared absorber based on composite grooves
Received:July 05, 2017  Revised:September 05, 2017  download
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Author NameAffiliationE-mail
CHEN Xi College of Physics and Electronic Engineering, Shanxi University 
XUE Wen-Rui College of Physics and Electronic Engineering, Shanxi University 
ZHAO Chen College of Physics and Electronic Engineering, Shanxi University 
LI Chang-Yong State Key Laboratory of Quantum Optics and Quantum Optic Devices, Institute of Laser Spectroscopy, Shanxi University 
Abstract:A grating-type infrared absorber based on LiF and NaF material composite grooves is designed. The finite-difference frequency-domain (FDFD) method is used to analyze the absorption mechanism. In addition, the influence of the structure parameters of the absorber, the wavelength of the incident wave and the incident angle on the absorption characteristics are investigated. The results show that this absorber will form different optical resonators for incident light of different wavelengths in infrared region, which can strongly absorb infrared light over a wide wavelength range. The absorber has a good absorption performance in the range of 18~70 μm wavelength range and 0~80° of incident by using the optimized parameters. The research work of this paper provides a theoretical basis for the design, fabrication and application of the grating-type infrared absorber.
keywords:Absorber, grating, infrared, surface plasmon
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Copyright:《Journal of Infrared And Millimeter Waves》