Ge/ZnSe一维光子晶体设计及其可见/红外反射光谱调控  

Design of Ge/ZnSe One-Dimensional Photonic Crystal and Visible/Infrared Reflectance Spectroscopy Control

作　　者：王雅颖 鲍学聪 王长昊 王冰 王如志[1,2] WANG Yaying;BAO Xuecong;WANG Changhao;WANG Bing;WANG Ruzhi(School of Materials Science and Engineering,Beijing University of Technology,Beijing 100124,China;Key Laboratory of New Functional Materials,Ministry of Education,Beijing 100124,China)

机构地区：[1]北京工业大学材料科学与工程学院,北京100124 [2]新型功能材料教育部重点实验室,北京100124

出　　处：《有色金属工程》2024年第11期35-40,48,共7页Nonferrous Metals Engineering

摘　　要：光子晶体因其光学隐身方面的潜在应用引起了人们极大的研究兴趣,但是在实际研究上,较少涉及到可见光与红外波段兼容的隐身结构。设计了Ge/ZnSe光子晶体在可见光(0.4~0.8μm)、中红外(3~5μm)与远红外(8~14μm)三个波段兼容隐身的光子晶体结构。首先,通过调制光子晶体的膜层厚度与周期数,得到了在中红外(3~5μm)波段平均反射率可达到83.63%的Ge/ZnSe光子晶体,并且在远红外(8~14μm)波段该光子晶体平均反射率也达到83.2%,表明其具有优良的中远红外光谱高反射率特性。之后,通过在光子晶体结构最上层添加MgF_(2)薄膜,可以使可见光反射率降低到20%,从而实现可见光高透明度、低可视度的效果。另一方面,也可以在光子晶体最上层添加MgF_(2)/Ge光子晶体结构,使可见光反射率增加到70.1%,从而抑制光照条件下材料对太阳光能量的吸收,抑制温度升高,辅助降低红外辐射特性。Photonic crystals have attracted great research interest due to their potential applications in optical stealth,but in practical research,there is relatively little focus in stealth structures that are compatible with both visible and infrared bands.In this article,a Ge/ZnSe photonic crystal structure that stealth in three bands:visible light(0.4—0.8μm),mid-infrared(3—5μm),and far-infrared(8—14μm)was designed.Firstly,a Ge/ZnSe photonic crystal with an average reflectivity of 83.63%in the mid-infrared(3—5μm)band and an average reflectivity of 83.2% in the far-infrared(8—14μm)band was obtained by modulating the film thickness and number of cycles of the photonic crystal,indicating its excellent high reflectivity characteristics in the mid and far infrared spectra.Afterwards,by adding an MgF_(2) thin film to the top layer of the photonic crystal structure,the visible light reflectance can be reduced to 20%,thereby achieving high transparency and low visibility for visible light.On the other hand,an MgF_(2)/Ge photonic crystal structure can also be added to the top layer of the photonic crystal to increase the visible light reflectance to 70.1%,thereby suppressing the absorption of solar energy by the material under illumination conditions,suppressing the temperature rise,and assisting in reducing infrared radiation characteristics.

关 键 词：光子晶体 红外发射率 多波段兼容 可见光反射率 

分 类 号：TB34[一般工业技术—材料科学与工程] O734[理学—晶体学]