Measurement of the Total Optical Angular Momentum Transfer in Optical Tweezers

Parkin, Simon, Knoener, Gregor, Nieminen, Timo A., Heckenberg, Norman R. and Rubinsztein-Dunlop, Halina (2006) Measurement of the Total Optical Angular Momentum Transfer in Optical Tweezers. Optics Express, 14 15: 6963-6970. doi:10.1364/OE.14.006963

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Author Parkin, Simon
Knoener, Gregor
Nieminen, Timo A.
Heckenberg, Norman R.
Rubinsztein-Dunlop, Halina
Title Measurement of the Total Optical Angular Momentum Transfer in Optical Tweezers
Journal name Optics Express   Check publisher's open access policy
ISSN 1094-4087
Publication date 2006-07-01
Year available 2006
Sub-type Article (original research)
DOI 10.1364/OE.14.006963
Open Access Status DOI
Volume 14
Issue 15
Start page 6963
End page 6970
Total pages 8
Place of publication WASHINGTON
Publisher Optical Society of American (OSA)
Language eng
Subject 240400 Optical Physics
249903 Instruments and Techniques
Abstract We describe a way to determine the total angular momentum, both spin and orbital, transferred to a particle trapped in optical tweezers. As an example an LG02 mode of a laser beam with varying degrees of circular polarisation is used to trap and rotate an elongated particle with a well defined geometry. The method successfully estimates the total optical torque applied to the particle. For this technique, there is no need to measure the viscous drag on the particle, as it is an optical measurement. Therefore, knowledge of the particle's size and shape, as well as the fluid's viscosity, is not required.
Keyword optical tweezers
optical angular momentum
orbital angular momentum
optical torque
Q-Index Code C1
Institutional Status UQ

 
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Created: Mon, 31 Jul 2006, 10:00:00 EST by Timo Nieminen on behalf of Library Corporate Services