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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 4, Iss. 10 — Oct. 2, 2009

Rotation of birefringent particles in optical tweezers with spherical aberration

Min-Cheng Zhong, Jin-Hua Zhou, Yu-Xuan Ren, Yin-Mei Li, and Zi-Qiang Wang  »View Author Affiliations


Applied Optics, Vol. 48, Issue 22, pp. 4397-4402 (2009)
http://dx.doi.org/10.1364/AO.48.004397


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Abstract

Birefringent particles rotate when trapped in elliptically polarized light. When an infinity corrected oil-immersion objective is used for trapping, rotation of birefringent particles in optical tweezers based on an infinity optical microscope is affected by the spherical aberration at the glass–water interface. The maximum rotation rate of birefringent particles occurs close to the coverslip, and the rotation rate decreases dramatically as the trapped depth increases. We experimentally demonstrate that spherical aberration can be compensated by using a finite-distance-corrected objective to trap and rotate the birefringent particles. It is found that the trapped depth corresponding to the maximum rotation rate is 50 μm , and the rotation rates at deep trapped depths are improved.

© 2009 Optical Society of America

OCIS Codes
(120.4570) Instrumentation, measurement, and metrology : Optical design of instruments
(140.7010) Lasers and laser optics : Laser trapping
(260.1440) Physical optics : Birefringence

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: March 9, 2009
Revised Manuscript: June 29, 2009
Manuscript Accepted: July 3, 2009
Published: July 23, 2009

Virtual Issues
Vol. 4, Iss. 10 Virtual Journal for Biomedical Optics

Citation
Min-Cheng Zhong, Jin-Hua Zhou, Yu-Xuan Ren, Yin-Mei Li, and Zi-Qiang Wang, "Rotation of birefringent particles in optical tweezers with spherical aberration," Appl. Opt. 48, 4397-4402 (2009)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ao-48-22-4397

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