School of Physical Science and Technology, Soochow University, Suzhou 215006, China.
Opt Lett. 2011 Jun 15;36(12):2251-3. doi: 10.1364/OL.36.002251.
The radiation forces on a Rayleigh dielectric sphere induced by a focused partially coherent elegant Laguerre-Gaussian (ELG) beam are investigated by using the Rayleigh scattering theory. It is found that a focused partially coherent ELG beam with suitable mode orders can be used to trap a Rayleigh particle whose refractive index is larger or smaller than that of the ambient by varying its initial spatial coherence width. Therefore, one can use one optical-trap system to trap two types of particles with different refractive indices.
采用瑞利散射理论研究了在聚焦部分相干优雅拉盖尔-高斯（ELG）光束作用下，瑞利介质球所受辐射力。研究发现，通过改变初始空间相干宽度，可以使用具有合适模式阶数的聚焦部分相干 ELG 光束来捕获折射率大于或小于环境折射率的瑞利粒子。因此，可以使用一个光学捕获系统来捕获两种具有不同折射率的粒子。
