Acta Optica Sinica, Volume. 39, Issue 10, 1005001(2019)
Grating-Type Mid-Infrared Absorber Based on Hexagonal Boron Nitride Material
Herein, a mid-infrared absorber based on the hexagonal boron nitride material is designed. The absorber is an one-dimensional grating comprising a truncated pyramid-type unit structure whose absorption mechanism is based on magnetic polaritons and Fabry-Perot cavity resonance effect. The influences of the structural parameters, working wavelength, and incident angle of the absorber on absorption performance are analyzed by using the finite element algorithm. Results show that,under optimized structural parameters, the absorption of the absorber can reach 80% or more in the range of 5.6-14.5 μm when the incident angle range is 0° -75°. The absorber designed herein is expected to be applied to the sensing and stealth aspects at the mid-infrared band.
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Yuefei Chen, Wenrui Xue, Chen Zhao, Chen Zhang, Changyong Li. Grating-Type Mid-Infrared Absorber Based on Hexagonal Boron Nitride Material[J]. Acta Optica Sinica, 2019, 39(10): 1005001
Category: Diffraction and Gratings
Received: Apr. 30, 2019
Accepted: Jun. 12, 2019
Published Online: Oct. 9, 2019
The Author Email: Xue Wenrui (wrxue@sxu.edu.cn)