基于微纳结构及材料特性的光场调控模拟研究  

Simulation of light field regulation based on micro-nano structure and material properties

作　　者：郑鑫智 豆世骥 刘翔 赵晨淅 赵世龙 杨月[2] 王少义[2] 赵宗清[2] 马钰洁 Zheng Xinzhi;Dou Shiji;Liu Xiang;Zhao Chenxi;Zhao Shilong;Yang Yue;Wang Shaoyi;Zhao Zongqing;Ma Yujie(College of Engineering Physics,Shenzhen Technology University,Shenzhen 518118,China;Laser Fusion Research Center,CAEP,Mianyang 621900,China)

机构地区：[1]深圳技术大学工程物理学院,广东深圳518118 [2]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《强激光与粒子束》2024年第3期85-91,共7页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(11975214)。

摘　　要：利用时域有限差分算法(FDTD)对微纳结构靶的光场分布进行仿真模拟,探究微纳结构靶中的光传输机制,分析材料特性和结构参数对光传输特性和光场分布的影响。基于光场分布及演化的仿真模拟结果,对比半导体氧化铝、绝缘体二氧化硅和金属铜三种导电性不同的材料上纳米线和纳米孔阵列微纳结构靶的激光传输特性,分析光传输过程中的光场分布变化。研究结果表明,通过改变氧化铝和二氧化硅纳米孔(线)阵列结构靶中孔洞(纳米线)直径和间距等结构参数,可以实现对微纳结构靶中光传输特性和光场分布的调制,实现光场在介质材料和真空区域间的周期振荡分布,或是以一种稳定形态传输;激光在铜纳米孔阵列中传输时,透光性随孔洞半径的增加而增加。基于光场分布及演化的仿真模拟结果,对比不同材料、不同微纳结构靶的激光传输演化特性,给出物理图像及对应现象规律,根据光场调控需求,给出微纳结构靶设计。The finite-difference time-domain algorithm(FDTD)was used to simulate the optical field distribution of the micro-nano structure target,explore the optical transmission mechanism in the micro-nano structure target,and analyze the influence of material properties and structural parameters on the optical transmission characteristics and optical field distribution.Based on the simulation results of optical field distribution and evolution,the laser transmission characteristics in the nano-wire and nano-pore array targets of semiconductor alumina,insulator silicon dioxide and metal copper with different electrical conductivity are compared,and the modifications of optical field distribution during optical transmission are analyzed.The results show that the optical transmission characteristics and optical field distribution in the target can be modulated by changing the diameter and spacing of the holes(nanowires)in the target structure,and the optical field can be periodically oscillated between the dielectric material and the vacuum region,or transmitted in a stable state.When the laser is transmitted in the copper nanopore array,the light transmittance increases with the increase of the hole radius.Based on the simulation results of light field distribution and evolution,the laser transmission properties of different materials and micro-nano structure targets are compared,the physical images and corresponding phenomena are given,and the micro-nano structure target design is given according to the requirements of light field regulation.

关 键 词：纳米孔阵列结构靶 纳米线阵列结构靶 氧化铝 二氧化硅 铜 光场分布 

分 类 号：TN25[电子电信—物理电子学]