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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 11, Iss. 5 — Mar. 10, 2003
  • pp: 446–451

Orientation of flat particles in optical tweezers by linearly polarized light

Péter Galajda and Pál Ormos  »View Author Affiliations

Optics Express, Vol. 11, Issue 5, pp. 446-451 (2003)

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Micrometer-sized objects with flat shapes have been oriented in optical tweezers formed by polarized light. The orienting torque originates from the anisotropic scattering of polarized light by the trapped particle. We investigated this effect experimentally on objects produced by photopolymerization. We determined and characterized the orienting torque acting on these particles, and the results were interpreted by model calculations. By manipulating particles with appropriately shaped optical tweezers, we can fully control the position of the particle in the trap. The torque exerted on the object can be measured and controlled. This angular trapping effect offers a useful extension of optical tweezer applications.

© 2002 Optical Society of America

OCIS Codes
(140.7010) Lasers and laser optics : Laser trapping
(260.5430) Physical optics : Polarization
(290.5850) Scattering : Scattering, particles

ToC Category:
Research Papers

Original Manuscript: December 19, 2002
Revised Manuscript: February 26, 2003
Published: March 10, 2003

Peter Galajda and Pal Ormos, "Orientation of flat particles in optical tweezers by linearly polarized light," Opt. Express 11, 446-451 (2003)

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