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Thursday, August 9, 2012

Analysis of radiation pressure force exerted on a biological cell induced by high-order Bessel beams using Debye series

Renxian Li, Kuan Fang Ren, Xiang'e Han, Zhensen Wu, Lixin Guo, Shuxi Gong

Debye series expansion (DSE) is employed to the analysis of radiation pressure force (RPF) exerted on biological cells induced by high-order Bessel beams (BB). The Beam Shape Coefficients (BSCs) for high-order Bessel beams are calculated using analytical expressions obtained by the Integral Localized Approximation (ILA). Different types of cells, including a real Chinese Hamster Ovary cell (CHO) and a lymphocyte which are respectively modeled by a coated and five-layered sphere, are considered. The RPF induced by high-order Bessel beams is compared with that by Gaussian beams and zeroth-order Bessel beams, and the effect of different scattering processes on RPF is studied. Numerical calculations show that high-order Bessel beams with zero central intensity can also transversely trap particle in the beam center, and some scattering processes can provide longitudinal pulling force.

DOI

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