Transverse optical trapping of spherical particle with strong absorption in a focused Gaussian beam

Yanfeng Zhang; Yudong Li; Guoxin Cui; Hongbing Liu; Jing Chen; Jingjun Xu; Qian Sun

doi:10.1117/12.755516

4 January 2008 Transverse optical trapping of spherical particle with strong absorption in a focused Gaussian beam

Yanfeng Zhang, Yudong Li, Guoxin Cui, Hongbing Liu, Jing Chen, Jingjun Xu, Qian Sun

Proceedings Volume 6832, Holography and Diffractive Optics III; 68320K (2008) https://doi.org/10.1117/12.755516
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

In this work, the transverse optical trapping of spherical particle with strong absorption is studied in geometrical optics model by numerical simulation. In our work, the exact expressions of wave vector are used instead of traditional approximate expressions, and the transverse optical trapping force acting on a spherical particle due to strong absorption is calculated when the particle is illuminated by a focused Gaussian beam of TEM₀₀ mode. The calculated results show that stable transverse optical trapping positions only exist when the center of the spherical particle is located in front of the focus of the beam. Our results also reveal that the trapping positions are decided by the radius of the beam waist ω0. The magnitude of transverse optical trapping force and the stiffness of optical trapping decrease with the increase in ω0.

Citation Download Citation

Yanfeng Zhang, Yudong Li, Guoxin Cui, Hongbing Liu, Jing Chen, Jingjun Xu, and Qian Sun "Transverse optical trapping of spherical particle with strong absorption in a focused Gaussian beam", Proc. SPIE 6832, Holography and Diffractive Optics III, 68320K (4 January 2008); https://doi.org/10.1117/12.755516

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