电介质/金属/电介质膜系实现可见光波段高透兼容激光隐身研究  

Research on realizing high permeability and laser stealth compatibility in visible light band with dielectric/metal/dielectric film system

作　　者：农洁 张伊祎 韦雪玲 姜鑫鹏 李宁 王冬迎[2,3] 肖思洋 陈泓廷 张振荣 杨俊波 Nong Jie;Zhang Yi-Yi;Wei Xue-Ling;Jiang Xin-Peng;Li Ning;Wang Dong-Ying;Xiao Si-Yang;Chen Hong-Ting;Zhang Zhen-Rong;Yang Jun-Bo(Key Laboratory of Multimedia Communication and Network Technology,Guangxi University,Nanning 530004,China;Center of Material Science,National University of Defense Technology,Changsha 410073,China;College of Sciences,Southwest University of Science and Technology,Mianyang 621010,China)

机构地区：[1]广西大学计算机与电子信息学院,广西多媒体通信与网络技术重点实验室,南宁530004 [2]国防科技大学物质与材料科学实验中心,长沙410073 [3]西南科技大学数理学院,绵阳621010

出　　处：《物理学报》2023年第17期335-346,共12页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:12272407,62275269,62275271);国家重点研发计划(批准号:2022YFF0706005);粤桂联合科学重点基金(批准号:2021GXNSFDA076001)资助的课题.

摘　　要：各类光电设备的光学窗口中普遍存在的“猫眼效应”是激光主动探测系统的主要依据,这对军事装备和单兵作战人员构成了极大的威胁.然而,在保证高可见光透过率的条件下,针对激光主动探测的狙击隐身方案仍然有待商榷.本文利用遗传算法对超表面减反射膜进行逆向设计,用Si_(3)N_(4)和Ag组成三层减反增透膜,并在其顶层增加长方形阵列的微纳结构金属形成波长选择性吸收器,以实现激光波长低反射高吸收的效果.将器件设计与遗传算法相互结合,通过算法优化得出最符合器件目标性能的参数组合,达到了可见光平均透过率88%,最大透过峰值94%,1550 nm激光波长反射率10%,吸收率80%的效果.本文设计的超表面减反射膜不需要增加额外装置且成像质量得以保证,同时能有效减小激光的回波能量,从而高质量地实现可见光透过与激光隐身的兼容,为反猫眼探测的作战策略提供了一种行之有效的设计思路.The“cat’s eye effect”in the optical window of all kinds of photoelectric equipment is the main basis of a laser active detection system,which poses a great threat to military equipment and combatants.However,under the condition of ensuring high visible transmittance,the sniper stealth scheme for anti-laser active detection remains to be discussed.In this paper,genetic algorithm is used to inverse design the metasurface anti-reflection film.The three-layer anti-reflection film are composed of Si_(3)N_(4) and Ag,and rectangular array of metal micro-nano structures is added on the top layer to form a wavelength selective absorber,so as to achieve the effect of low reflection and high absorption at laser wavelength.By combining the device design with genetic algorithm,the parameter combination that best possesses the target performance of the device is obtained.The average transmittance in a wavelength range of 380−780 nm is 88%,and a maximum transmittance peak is 94%.The reflectance and the absorption rate at 1550 nm are achieved to be 10% and 80%,respectively.In order to better meet the requirements for practical application,we further design the cross metal array to obtain polarization insensitive characteristics.The metasurface anti-reflective membrane with improved structure can achieve an average visible transmittance of 82% and a reflectance of 5% at 1550 nm.The two metasurface anti-reflection films designed in this work do not require additional devices,and the imaging quality can be guaranteed.At the same time,it can effectively reduce the laser echo energy,so as to achieve the effect of high-quality visible light transmittance and laser stealth compatibility.

关 键 词：电介质/金属/电介质膜系 激光隐身 表面等离极化激元 遗传算法 

分 类 号：TJ5[兵器科学与技术—军事化学与烟火技术] TN249[电子电信—物理电子学]