Enhanced reflection laser protection thin films compatible with visible light stealth  

作　　者：Zexiang He Zexiong Hu Jian Yang Weijie Chen Zhenzhen Duan Ning Wang Dan Wang Xiaotan Ji Nan Chen Zhengqian Luo Yikun Bu 何泽湘;胡泽雄;杨坚;陈炜杰;段珍珍;王宁;王丹;纪晓锬;陈楠;罗正钱;卜轶坤

机构地区：[1]School of Electronic Science and Engineering(National Model Microelectronics College),Xiamen University,Xiamen 361005,China [2]Fujian Key Laboratory of Ultrafast Laser Technology and Applications,Xiamen University,Xiamen 361005,China

出　　处：《Chinese Optics Letters》2025年第1期120-126,共7页中国光学快报(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.62375231);the National Key Research and Development Program of China(No.2020YFC2200403);the Fujian Province Science and Technology Planning Project of China(No.2022H6015)。

摘　　要：For bicolor regulation in laser protection compatible with visible light stealth,a metal–dielectric–enhanced reflection asymmetric Fabry–Perot structure is proposed that has high reflectance at the laser wavelength and the color control of the visible spectrum.The six-layer reflection enhancement unit is composed of an Al metal mirror,SiO2,Ta2O5,and an ultrathin Nb metal layer.The synergistic relationship between the background color and laser wavelength reflectance was analyzed and simulated.Six different colors from blue to red with high reflectance at 1064 nm laser wavelength up to 97.84%were prepared.The thin films can withstand 2535 W cm-2power density continuous irradiation for 60 s without being destroyed.Moreover,a symmetrical structure presents the spectrum consistency from both directions,which makes the potential to be applied to the laser protective coatings.The blue symmetrical microreflector sample was prepared and sprayed on the nonplanar models to demonstrate the actual application effect.This simple and efficient scheme provides an innovative technical approach in the field of surface laser protection.

关 键 词：laser protection visible light stealth thin films 

分 类 号：O484[理学—固体物理]