期刊
OPTICS COMMUNICATIONS
卷 282, 期 17, 页码 3421-3425出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2009.05.045
关键词
Polarization; Vector field; Computer-generated holograms; Optical cage; Optical tweezers
类别
资金
- NSFC [10874078, 60608006]
- Natural Science Foundation of Jiangsu Province [BK2007126]
- State Key Program for Basic Research of China [2006CB921805]
We propose a new approach to generate a controllable three-dimensional (3D) optical cage by double-mode cylindrical vector beam in the vicinity of focus, by controlling the polarization state of beam. The simulation results show that the 3D optical cage of spheroid surface shape with a sharp dark region surrounded by a uniform optical barrier with a maximum deviation of 2% is achieved. The finite-difference time-domain calculation of optical force validates that such a kind of 3D optical cage has the trapping capability of the low-refractive-index particles with the size being much smaller than the light wavelength. (c) 2009 Elsevier B.V. All rights reserved.
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