In this paper, COMSOL Multiphysics software based on finite element method was used to design a GaAs nanowire array simulation model absorbed with metal nanoparticles. We studied the effects of the size, position and number of metal nanoparticles on their light absorption, and in this experiment, precious metal (Ag, Pt) and alkali metal (Na, Li) particles adsorbed on nanowires. The results show that the adsorption of metal particles is helpful to improve the light binding capacity of short wavelength nanowire arrays. With the change of the radius, position and number of particles, the nanowires absorbed by Li and Ag nanoparticles showed better light absorption characteristics. The optical trapping effect can be effectively enhanced by increasing the size of particles, the number of surrounding particles and the number of particles which distributed along the nanowire direction appropriately.

本文利用基于有限元方法的COMSOL Multiphysics软件设计了被金属纳米粒子吸收的GaAs纳米线阵列仿真模型。我们研究了金属纳米颗粒的大小，位置和数量对其光吸收的影响，在本实验中，纳米颗粒上吸附了贵金属（Ag，Pt）和碱金属（Na，Li）颗粒。结果表明，金属颗粒的吸附有助于提高短波长纳米线阵列的光结合能力。随着粒子的半径，位置和数量的变化，被Li和Ag纳米粒子吸收的纳米线表现出更好的光吸收特性。可以通过增加粒子的尺寸来有效地增强光学捕获效果，