Passive torque wrench and angular position detection using a single-beam optical trap
Optics Letters, Vol. 35, Issue 17, pp. 2949-2951 (2010)
http://dx.doi.org/10.1364/OL.35.002949
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Abstract
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
History
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
Citation
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)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-17-2949
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