Abstract
Optical trapping is of great practical importance in various fields such as physics, biology and nanofluidics or microfluidics. In order to trap and move particles efficiently, it is necessary to theoretically study the radiation pressure face exerted on the particles firstly. We introduce Debye series expansion (DSE), which can give physical explanation of each scattering process, to analyze radiation pressure force exerted on a spherical particle generated by focused beams. The DSE is employed to the study of radiation pressure force corresponding to single scattering process, and to the research on the effect of various parameters such as beam position and mode p on radiation pressure force.
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