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Optics Letters

Optics Letters


  • Vol. 17, Iss. 11 — Jun. 1, 1992
  • pp: 772–774

Movement of micrometer-sized particles in the evanescent field of a laser beam

Satoshi Kawata and Tadao Sugiura  »View Author Affiliations

Optics Letters, Vol. 17, Issue 11, pp. 772-774 (1992)

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We report that small particles with diameters of 1–27 μm have moved in the evanescent fields produced by a laser beam. The evanescent field in the experiment was produced in the near field of the surface of a high-refractive-index sapphire prism illuminated by a 1.06-μm YAG laser beam with an incident angle larger than the critical angle. Both polystyrene latex spheres and glass spheres bounced and ran along the surface of the prism when the laser beam was on. The maximum running speed obtained was approximately 20 μm/s. A micrograph of the running particles is shown with plots of the measured velocity versus the incident angle of the laser beam. Applications of this phenomenon are also discussed.

© 1992 Optical Society of America

Original Manuscript: March 2, 1992
Published: June 1, 1992

Satoshi Kawata and Tadao Sugiura, "Movement of micrometer-sized particles in the evanescent field of a laser beam," Opt. Lett. 17, 772-774 (1992)

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