Launch and capture of a single particle in a pulse-laser-assisted dual-beam fiber-optic trap

OPTICS COMMUNICATIONS

卷:417

Article

Fu, Zhenhai¹  She, Xuan¹  Li, Nan¹  Hu, Huizhu¹ 

[1] Zhejiang Univ, Coll Opt Sci & Engn, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Zhejiang, Peoples R China

关键词: Optical trap;    Pulse laser;    Particle manipulation;   

DOI  :  10.1016/j.optcom.2018.02.040

来源: Elsevier

【 摘 要 】

The rapid loading and manipulation of microspheres in optical trap is important for its applications in optomechanics and precision force sensing. We investigate the microsphere behavior under coaction of a dual-beam fiber-optic trap and a pulse laser beam, which reveals a launched microsphere can be effectively captured in a spatial region. A suitable order of pulse duration for launch is derived according to the calculated detachment energy threshold of pulse laser. Furthermore, we illustrate the effect of structural parameters on the launching process, including the spot size of pulse laser, the vertical displacement of beam waist and the initial position of microsphere. Our result will be instructive in the optimal design of the pulse-laser-assisted optical tweezers for controllable loading mechanism of optical trap.

【 授权许可】

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