光学学报, 2019, 39 (10): 1005001, 网络出版: 2019-10-09
基于六方氮化硼材料的光栅型中红外线吸收器 下载: 917次
Grating-Type Mid-Infrared Absorber Based on Hexagonal Boron Nitride Material
光栅 吸收器 中红外 氮化硼 磁激元共振 法布里-珀罗谐振腔 gratings absorber mid-infrared boron nitride magnetic polariton resonance Fabry-Perot cavity
摘要
设计了一种基于六方氮化硼材料的中红外线吸收器。该吸收器是由截断的金字塔型单元结构构成的一维光栅,其吸收机制是磁激元共振效应和法布里-珀罗谐振腔共振效应。运用有限元算法分析该吸收器的结构参数、工作波长及入射角度对其吸收性能的影响。结果表明:在优化的结构参数条件下,在入射波长为5.6~14.5 μm,入射角度为0°~75°范围内,该吸收器的吸收率可以达到80%以上。所设计的吸收器有望应用于中红外波段的传感和隐身等领域。
Abstract
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.
陈岳飞, 薛文瑞, 赵晨, 张晨, 李昌勇. 基于六方氮化硼材料的光栅型中红外线吸收器[J]. 光学学报, 2019, 39(10): 1005001. 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.