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Optics Letters

Optics Letters


  • Vol. 27, Iss. 9 — May. 1, 2002
  • pp: 743–745

Rotational control within optical tweezers by use of a rotating aperture

Anna T. O'Neil and Miles J. Padgett  »View Author Affiliations

Optics Letters, Vol. 27, Issue 9, pp. 743-745 (2002)

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We demonstrate a simplified method of rotational control of objects trapped within optical tweezers that does not require high-order modes, interferometric precision, or computer-controlled optical modulators. Inserting a rectangular aperture into the optical beam results in a focused spot that also has rectangular symmetry. We show that an asymmetric object trapped in the beam has its angular orientation fixed such that rotation of the aperture results in a direct rotation of the particle.

© 2002 Optical Society of America

OCIS Codes
(140.7010) Lasers and laser optics : Laser trapping
(350.0350) Other areas of optics : Other areas of optics

Anna T. O'Neil and Miles J. Padgett, "Rotational control within optical tweezers by use of a rotating aperture," Opt. Lett. 27, 743-745 (2002)

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