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Tunable optical gradient trap by radial varying polarization Bessel-Gauss beam

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DOI: 10.4236/jbise.2010.33041    4,290 Downloads   7,910 Views   Citations

ABSTRACT

Optical tweezers play an important role in many domains, especially in life science. And optical gradient force is necessary for constructing optical tweezers. In this paper, the optical gradient force in the focal region of radial varying polarization Bessel- Gauss beam is investigated numerically by means of vector diffraction theory. Results show that the beam parameter and vary rate parameter that indicates the change speed of polarization rotation angle affect the optical gradient force pattern very considerably, and some novel force distributions may come into being, such as multiple force minimums, force ring, and force crust. Therefore, the focusing of radial varying polarization Bessel-Gauss beam can be used to construct optical traps.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Gao, X. , Hu, S. , Li, J. , Ding, Z. , Guo, H. and Zhuang, S. (2010) Tunable optical gradient trap by radial varying polarization Bessel-Gauss beam. Journal of Biomedical Science and Engineering, 3, 304-307. doi: 10.4236/jbise.2010.33041.

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