Li Jing, Wu Xiaoping
Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230027, China.
Opt Express. 2011 Oct 10;19(21):20736-42. doi: 10.1364/OE.19.020736.
In this paper a model of the trapping force on nanowires is built by three dimensional finite-difference time-domain (FDTD) and Maxwell stress tensor methods, and the tightly focused laser beam is expressed by spherical vector wave functions (VSWFs). The trapping capacities on nanoscale-diameter nanowires are discussed in terms of a strongly focused linearly polarized beam and radially polarized beam. Simulation results demonstrate that the radially polarized beam has higher trapping efficiency on nanowires with higher refractive indices than linearly polarized beam.
本文采用三维时域有限差分（FDTD）法和麦克斯韦应力张量法建立了纳米线捕获力模型，并用球矢量波函数（VSWFs）表示紧聚焦激光束。从强聚焦线偏振光束和径向偏振光束的角度讨论了纳米级直径纳米线的捕获能力。仿真结果表明，与线偏振光束相比，径向偏振光束对具有较高折射率的纳米线具有更高的捕获效率。
