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Opt Express. 2010 Mar 15;18(6):5724-9. doi: 10.1364/OE.18.005724.

Quasi 3-dimensional optical trapping by two counter-propagating beams in nano-fiber.

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  • 1The MOE Key Laboratory of Advanced Technique and Fabrication of Weak-light Nonlinear Photonics Materials, Tianjin Key Laboratory of Photonics and Technology of Information Science, School of Physics, Nankai University,Tianjin 300071, PR China.


Optical forces on a nanoparticle around an absorptive dielectric nano-fiber illuminated by two linear polarized counter-propagating beams were investigated. The results show the scattering force of the two beams causes the steady trapping along the fiber and the gradient force makes the trapping in the transverse plane of the nano-fiber. By altering the intensity ratio between the two incident beams and the polarization direction of the beams, manipulation along the nano-fiber and in the transverse direction can be realized, respectively. The numerical results present a new promising method to realize quasi 3-dimensional optical manipulation.

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