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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 17 — Sep. 1, 2010
  • pp: 2949–2951

Passive torque wrench and angular position detection using a single-beam optical trap

James Inman, Scott Forth, and Michelle D. Wang  »View Author Affiliations

Optics Letters, Vol. 35, Issue 17, pp. 2949-2951 (2010)

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The recent advent of angular optical trapping techniques has allowed for rotational control and direct torque measurement on biological substrates. Here we present a method that increases the versatility and flexibility of these techniques. We demonstrate that a single beam with a rapidly rotating linear polarization can be utilized to apply a constant controllable torque to a trapped particle without active feedback, while simultaneously measuring the particle angular position. In addition, this device can rapidly switch between a torque wrench and an angular trap. These features should make possible torsional measurements across a wide range of biological systems.

© 2010 Optical Society of America

OCIS Codes
(140.7010) Lasers and laser optics : Laser trapping
(260.2130) Physical optics : Ellipsometry and polarimetry
(260.5430) Physical optics : Polarization
(350.4855) Other areas of optics : Optical tweezers or optical manipulation

ToC Category:
Lasers and Laser Optics

Original Manuscript: April 30, 2010
Revised Manuscript: July 12, 2010
Manuscript Accepted: July 29, 2010
Published: August 26, 2010

Virtual Issues
Vol. 5, Iss. 13 Virtual Journal for Biomedical Optics

James Inman, Scott Forth, and Michelle D. Wang, "Passive torque wrench and angular position detection using a single-beam optical trap," Opt. Lett. 35, 2949-2951 (2010)

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