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Proceedings Paper

Optical manipulation of single electrically charged biological particles
Author(s): Yong-Qing Li; Changan Xie; Mumtaz A. Dinno
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Paper Abstract

In this paper, we study optical trapping and manipulation of single electrically charged colloidal particles. We measured the dynamic motion of a charged particle captured in a linearly polarized optical trap. We found that the position's fluctuation of a trapped particle in the parallel direction to the lase polarization is larger than that in the normal direction to the polarization, which suggests that there exists an additional electric force parallel to the laser polarization direction exerting on the charged particle beside the known radiation forces on the dielectric particle. This asymmetry in dynamic motion is significant when the particle size is less than the wavelength of the trapping laser. We present both the theoretical and experimental results.

Paper Details

Date Published: 28 May 2002
PDF: 5 pages
Proc. SPIE 4622, Optical Diagnostics of Living Cells V, (28 May 2002); doi: 10.1117/12.468342
Show Author Affiliations
Yong-Qing Li, East Carolina Univ. (United States)
Changan Xie, East Carolina Univ. (United States)
Mumtaz A. Dinno, East Carolina Univ. (United States)

Published in SPIE Proceedings Vol. 4622:
Optical Diagnostics of Living Cells V
Robert C. Leif; Daniel L. Farkas; Robert C. Leif, Editor(s)

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