摘要
为了实现在不同背景温度条件下的红外隐身,需要研究具有可调发射率的红外隐身材料.此外,多波段兼容隐身技术在现代军事和科技中具有重要的研究价值.本文设计了一种利用单一多层膜结构实现多光谱可调谐的超材料吸收器.利用Ge_(2)Sb_(2)Te_(5)(GST)相变材料的晶态和非晶态不同属性,该结构实现了在大气窗口8~13μm波长范围内最大吸收率吸收从94.93%到9.19%的可控变化.而且通过控制中间态,结构对电磁波的吸收率可以实现连续变化.同时,该结构具有基于干涉效应的可调结构色,通过改变顶层薄膜的厚度,器件的颜色可以发生变化.因而同时实现了在红外及可见光两个波段对电磁波的独立调控功能.该超材料吸收器具有红外-可见光兼容隐身的潜在应用.
In order to achieve infrared stealth under different background temperatures,it is necessary to study infrared stealth materials with adjustable emissivity.In addition,multi-band compatible stealth technology has important research value in modern military,science and technology.In this paper,a metamaterial absorber with a single multilayer structure is designed to realize efficient multi-spectral manipulation.Ge_(2)Sb_(2)Te_(5)(GST)is a phase-changing material.Crystalline GST and amorphous GST have different infrared electromagnetic properties.Utilizing this property of GST,the maximum absorptivity of the designed structure can be controlled from 94.93%to 9.19%in the wavelength range of 8~13μm.Moreover,the intermediate GST can be obtained by controlling the external conditions,and the absorptivity of the structure to the electromagnetic wave can be changed continuously.At the same time,the structure has tunable structure color based on interference effect,and the surface color of the device can be tuned by changing the thickness of the top film.Therefore,the independent tuning of electromagnetic wave in both infrared and visible bands is realized at the same time.The metamaterial absorber has the potential application of infrared-visible compatible stealth.
作者
黎思睿
李佳
刘科
黄奕嘉
李玲
周晓林
LI Si-Rui;LI Jia;LIU Ke;HUANG Yi-Jia;LI Ling;ZHOU Xiao-Lin(College of Physics and Electronic Engineering,Sichuan Normal University,Chengdu 610101,China;School of materials science and engineering,Southwest Jiaotong University,Chengdu 611756,China)
出处
《四川大学学报（自然科学版）》
CAS
CSCD
北大核心
2021年第6期115-122,共8页
Journal of Sichuan University(Natural Science Edition)
基金
四川省科技厅面上项目(2018JY0439)。
关键词
多层膜
吸收器
结构色
可调吸收率
Multilayer film
Absorber
Structural color
Tunable absorptivity
