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Applied Optics

Applied Optics


  • Vol. 37, Iss. 27 — Sep. 20, 1998
  • pp: 6386–6394

Axial force acting on a dielectric sphere in a focused laser beam

Shojiro Nemoto and Hiroyoshi Togo  »View Author Affiliations

Applied Optics, Vol. 37, Issue 27, pp. 6386-6394 (1998)

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We present the detailed behavior of the axial force acting on a dielectric sphere exerted by the optical pressure of a focused Gaussian laser beam. Comparison is made between the numerical results and those calculated from the radiation pressure cross section. There is also a discussion as to whether the expressions for the axial force given in this paper are consistent with the previously reported experimental results. Moreover, a simple experimental method to measure the axial force on a polystyrene sphere suspended in water is demonstrated, and fairly good agreement between theoretical and experimental results was obtained.

© 1998 Optical Society of America

OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.7010) Lasers and laser optics : Laser trapping
(350.4990) Other areas of optics : Particles

Original Manuscript: October 27, 1997
Revised Manuscript: April 15, 1998
Published: September 20, 1998

Shojiro Nemoto and Hiroyoshi Togo, "Axial force acting on a dielectric sphere in a focused laser beam," Appl. Opt. 37, 6386-6394 (1998)

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