title: Trapping two types of particles using a focused partially coherent elegant Laguerre-Gaussian beam.
abstract: 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.
authors.affiliation: School of Physical Science and Technology, Soochow University, Suzhou 215006, China.
authors.forename: Chengliang
authors.initials: C
authors.lastname: Zhao
authors.forename: Yangjian
authors.initials: Y
authors.lastname: Cai