Trapping two types of particles using a focused partially coherent elegant Laguerre-Gaussian beam |
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Authors: | Zhao Chengliang Cai Yangjian |
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Institution: | School of Physical Science and Technology, Soochow University, Suzhou 215006, China. |
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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. |
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