长波红外高透射率二维光子晶体设计及应用研究  

Design and application of long wave infrared high transmittance two dimensional photonic crystals

作　　者：王朝[1] 张轶 王晗 安泽琳 王超[1] 王如志[1] WANG Chao;ZHANG Yi;WANG Han;AN Ze-lin;WANG Chao;WANG Ru-zhi(Key Laboratory of Advanced Functional Materials of Ministry of Education,Institute of New Energy Materials and Devices of Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China;North China Research Institute of Electro Optics,Beijing 100015,China)

机构地区：[1]北京工业大学材料与制造学部,新能源材料与技术研究所,新型功能材料教育部重点实验室,北京100124 [2]华北光电技术研究所,北京100015

出　　处：《激光与红外》2023年第12期1885-1891,共7页Laser & Infrared

基　　金：国家重点研发计划项目(No.2021YFB3500403)资助。

摘　　要：近年来,如何提高红外探测器的光子吸收率是目前红外探测的重点研究之一,增加入射光的透射率是其中重要的一环。传统的多层减反膜受到粘附性,热失配和稳定性不足等问题在应用上受到一定限制。光子晶体是一种直接在光学表面加工微结构实现增透效果,不存在上述等问题,并且表现出较好的增透效果。但目前光子晶体设计结构复杂,对工艺加工带来困难。基于此本文设计了几种简单的ZnS光子晶体几何结构,包括长方体、圆柱体、六棱柱体和金字塔结构,在长波红外8~10μm波段内每种光子晶体结构的最佳平均透射率均在90以上,其中金字塔的增透效果最好。设计了金字塔阵列结构,透射率仿真结果表明金字塔阵列间隙在一定范围内均能保持98以上的透射率。最后探究了不同基底材料碲镉汞厚度和温度对光子晶体透射率的影响。本文研究可为光子晶体增透研究和微纳光学器件设计提供一定的借鉴意义。In recent years,improving the photon absorption rate of infrared detectors is one of the key researches in infrared detection,among which increasing the transmittance of incident light is an important step.The application of traditional multilayer antireflective films is limited by adhesion,thermal mismatch and lack of stability.Photonic crystal is a kind of reflection improvement effect which can be achieved by machining microstructures directly on optical surface.It does not have such problems as above,and shows a good reflection improvement effect.However,the complex structure of the current photonic crystal design poses difficulties for process machining.Based on the above problems,several simple geometric structures of ZnS photonic crystal are designed in this paper,including cuboid,cylinder,hexagonal prism and pyramid structure.In the long wave infrared band of 8~10μm,the best average transmittance of each kind of photonic crystal structure is above 90%,and pyramid has the best anti reflection effect.The pyramid array structure is designed,and the transmission simulation results show that the pyramid array gap can maintain more than 98%transmission in a certain range.Finally,the influence of the thickness and temperature of different substrate materials on the transmission of photonic crystal is investigated.The research in this paper can provide some reference for the research of photonic crystal anti reflection and the design of micro and nano optical devices.

关 键 词：红外探测 长波红外 光子晶体 增透设计 

分 类 号：O436[机械工程—光学工程] TN213[理学—光学]