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Proceedings Paper

Comparison of trap stiffness between a solid-mode optical trap and a donut-mode optical trap
Author(s): H. T. Chen; Zan Gong; Y. M. Li; L. R. Lou; D. Zhang; L. H. Yin
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Paper Abstract

Do-nut Mode Optical Trap is the kind of Optical Trap that the laser distribution in the center part of the beam is approximately zero. Because the trapping effect of an Optical Trap correlates closely with the distribution of optical field, the scattering force of Do-nut Mode Optical Trap is markedly reduced. We realized Do-nut Mode Optical Trap by rebuilding wave front. Then we studied the trapping effect and trap stiffness of Solid Mode Optical Trap and Do-nut Mode Optical Trap in the cases of upright microscope and inverted microscope. We measured the stiffness of the Optical Trap near the focus with Boltzmann statistics method. The distribution of the optical field of Do-nut Optical Trap is like aura. And the trapping effect changes with the diameter ratio of the aura.

Paper Details

Date Published: 20 September 2002
PDF: 7 pages
Proc. SPIE 4927, Optical Design and Testing, (20 September 2002); doi: 10.1117/12.471436
Show Author Affiliations
H. T. Chen, Univ. of Science and Technology of China (China)
Zan Gong, Univ. of Science and Technology of China (China)
Y. M. Li, Univ. of Science and Technology of China (China)
L. R. Lou, Univ. of Science and Technology of China (China)
D. Zhang, Univ. of Science and Technology of China (China)
L. H. Yin, Univ. of Science and Technology of China (China)


Published in SPIE Proceedings Vol. 4927:
Optical Design and Testing
Zhicheng Weng; Jose M. Sasian; Yongtian Wang, Editor(s)

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