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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. 13 — Dec. 2, 2009

Measurement of axial and transverse trapping stiffness of optical tweezers in air using a radially polarized beam

Masaki Michihata, Terutake Hayashi, and Yasuhiro Takaya  »View Author Affiliations


Applied Optics, Vol. 48, Issue 32, pp. 6143-6151 (2009)
http://dx.doi.org/10.1364/AO.48.006143


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Abstract

The trapping efficiency and stiffness of optical tweezers using radial polarization are evaluated; the ray-tracing method and a proposed measurement method are used for numerical and experimental analyses, respectively. The maximum axial trapping efficiency with radial polarization is 1.84 times that with linear polarization, while the maximum transverse trapping efficiency decreases by 0.58 times. Further, the axial and transverse trapping efficiencies are found to be 1.19 times larger and 0.83 times smaller, respectively, than the values with linear polarization. From the experiments, the axial and transverse stiffness values are 1.2 times larger and 0.8 times smaller, respectively, with radial polarization. Hence, radial polarization enhances the axial trapping properties while reducing the transverse trapping properties.

© 2009 Optical Society of America

OCIS Codes
(140.7010) Lasers and laser optics : Laser trapping
(230.1040) Optical devices : Acousto-optical devices
(350.4855) Other areas of optics : Optical tweezers or optical manipulation

ToC Category:
Trapping

History
Original Manuscript: June 29, 2009
Revised Manuscript: September 28, 2009
Manuscript Accepted: October 7, 2009
Published: November 2, 2009

Virtual Issues
Vol. 4, Iss. 13 Virtual Journal for Biomedical Optics

Citation
Masaki Michihata, Terutake Hayashi, and Yasuhiro Takaya, "Measurement of axial and transverse trapping stiffness of optical tweezers in air using a radially polarized beam," Appl. Opt. 48, 6143-6151 (2009)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ao-48-32-6143

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