Trapping two types of particles with a focused generalized Multi-Gaussian Schell model beam
Trapping two types of particles with a focused generalized Multi-Gaussian Schell model beam
复制标题
使用聚焦广义多高斯谢尔模型光束捕获两种类型的粒子
DOI：
10.1016/j.optcom.2015.06.002
复制
发表时间：
2015-11-01
影响因子：
2.4
通讯作者：
Zhao, Daomu
中科院分区：
文献类型：
--
作者：
Liu, Xiayin;Zhao, Daomu
数值研究了第一类广义多高斯谢尔模型（GMGSM）光束聚焦后在焦平面处产生空心光束的囚禁效应。通过计算聚焦GMGSM光束作用于瑞利介质球上的辐射力，证明了该光束可以在聚焦点捕获低折射率粒子，同时在焦平面的不同位置捕获高折射率粒子.捕获范围和稳定性取决于光束折射率N和相干宽度。在相同条件下，低折射率粒子和高折射率粒子稳定捕获的半径下限是不同的。(C)2015 Elsevier B.V.版权所有。
We numerically investigate the trapping effect of the focused generalized Multi-Gaussian Schell model (GMGSM) beam of the first kind which produces dark hollow beam profile at the focal plane. By calculating the radiation forces on the Rayleigh dielectric sphere in the focused GMGSM beam, we show that such beam can trap low-refractive-index particles at the focus, and simultaneously capture high-index particles at different positions of the focal plane. The trapping range and stability depend on the values of the beam index N and the coherence width. Under the same conditions, the low limits of the radius of low-index and high-index particles for stable trapping are indicated to be different. (C) 2015 Elsevier B.V. All rights reserved.