Journal
OPTICS EXPRESS
Volume 24, Issue 20, Pages 22596-22605Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.24.022596
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Funding
- National Natural Science Foundation of China [61178013]
- project for National Basic Science Personnel Training Fund of China [J1103210]
- Natural Science Foundation of Shanxi Province [2016011038]
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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 10.5-12.5 mu m and 0-80 degrees, 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. (C) 2016 Optical Society of America
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