Open AccessGrating-type mid-infrared light absorber based on silicon carbide material
Author(s) -
Wu Xue,
Xi Chen,
Yanling Peng,
Rongcao Yang
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.022596
Subject(s) - materials science , grating , optics , silicon carbide , absorption (acoustics) , infrared , molar absorptivity , optoelectronics , silicon , diffraction grating , surface plasmon polariton , surface plasmon , plasmon , composite material , physics
A kind of grating-type mid-infrared light absorber based on silicon carbide (SiC) material is designed and its absorption properties are studied using the finite-difference frequency-domain (FDFD) method. The results show that, its absorption mechanism is the excitation of surface plasmon and magnetic polariton as well as the loss of materials. Due to the optical characteristics of the SiC material in the mid-infrared band and the truncated pyramid structure in the grating, in the range of 10.5-12.5μm and 0-80°, absorptivity of higher than 80% can be obtained with optimized structural parameters. Among six structural parameters, the layer number of the composite layers has a relatively great influence on the absorption properties, while the thickness of the dielectric layer has less influence on the absorption properties.