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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editor: Gregory W. Faris
  • Vol. 4, Iss. 5 — May. 5, 2009

Motion control of low-index microspheres in liquid based on optical repulsive force of a focused beam array

Masaya Miyazaki and Yoshio Hayasaki  »View Author Affiliations

Optics Letters, Vol. 34, Issue 6, pp. 821-823 (2009)

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In the optical tweezers technique a microdielectric object with a higher refractive index than a surrounding liquid is trapped near the focal point of a laser beam, whereas an object with a lower refractive index is subjected to a repulsive force from the focused beam. We demonstrate that the optical repulsive forces are generated with a focused-beam array dynamically formed by a computer-generated hologram displayed on a liquid-crystal spatial light modulator. We also demonstrate that the optical repulsive forces perform a size selection and flow control of hollow glass microspheres.

© 2009 Optical Society of America

OCIS Codes
(020.7010) Atomic and molecular physics : Laser trapping
(050.1970) Diffraction and gratings : Diffractive optics
(090.1760) Holography : Computer holography
(350.4855) Other areas of optics : Optical tweezers or optical manipulation

ToC Category:
Lasers and Laser Optics

Original Manuscript: October 23, 2008
Revised Manuscript: January 19, 2009
Manuscript Accepted: January 30, 2009
Published: March 11, 2009

Virtual Issues
Vol. 4, Iss. 5 Virtual Journal for Biomedical Optics

Masaya Miyazaki and Yoshio Hayasaki, "Motion control of low-index microspheres in liquid based on optical repulsive force of a focused beam array," Opt. Lett. 34, 821-823 (2009)

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