Transverse trapping force on a Rayleigh particle in Bessel beam

zhang min; xu jianbo; li jie; dou huiqing; li xiaoqing; wang qiang

Volume 21 Issue 01

Jan. 2009

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Article Navigation > High Power Laser and Particle Beams > 2009 > 21(01): 0-

wang shuo, shao zhen-hai, wen guang-jun, et al. A new high order FDTD method based on wave equations[J]. High Power Laser and Particle Beams, 2007, 19.

Citation:

zhang min, xu jianbo, li jie, et al. Transverse trapping force on a Rayleigh particle in Bessel beam[J]. High Power Laser and Particle Beams, 2009, 21.

wang shuo, shao zhen-hai, wen guang-jun, et al. A new high order FDTD method based on wave equations[J]. High Power Laser and Particle Beams, 2007, 19.

Citation:

zhang min, xu jianbo, li jie, et al. Transverse trapping force on a Rayleigh particle in Bessel beam[J]. High Power Laser and Particle Beams, 2009, 21.

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Transverse trapping force on a Rayleigh particle in Bessel beam

1.
College of Physics and Electronics,Shandong Normal University,Ji’nan 250014,China

Publish Date: 2009-01-15

Abstract

Abstract

In order to obtain the most suitable optical fields to trap the Rayleigh particles, the expression of the minimum particle radius for Bessel beams capture was deduct through the electromagnetism model, and transverse forces and potential depths were calculated for Rayleigh particles in Bessel and Gaussian beams respectively. The results indicate that Rayleigh particles can be stably trapped under an incident power of 4 W only at the maximum of the optical fields, and the positions of trapping particles in the optical fields are the maximum and the secondary maximum for an incident power of 6 W. With similar laser parameters, Gaussian beams can not overtake the influences of Brownian motion to capture the Rayleigh-particles as Bessel beams do. Therefore, Bessel beams are better to trap the
- optical trapping,
- rayleigh particle,
- transverse force,
- bessel beam

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