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Title

Optical trapping force with annular and doughnut laser beams based on vectorial diffraction

Author(s)

Ganic, Djenan;  Gan, Xiaosong;  Gu, Min

Abstract

The inadequacy of the optical trapping model based on ray optics in the case of describing the optical trapping performance of annular and doughnut laser beams is discussed. The inadequacy originates from neglecting the complex focused field distributions of such beams, such as polarization and phase, and thus leads to erroneous predictions of trapping force. Instead, the optical trapping model based on the vectorial diffraction theory, which considers the exact field distributions of a beam in the focal region, needs to be employed for the determination of the trapping force exerted on small particles. The theoretical predictions of such a trapping model agree with the experimentally measured results.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Micro-Photonics

Source

Optics Express, Vol. 13, no. 4 (2005), pp. 1260-1265

Publication year

2005

Publisher

Optical Society of America

ISSN

1094-4087

Publisher URL

http://www.opticsexpress.org/abstract.cfm?uri=OE-13-4-1260

Copyright

Copyright © 2005 Optical Society of America. Published version of the paper reproduced here in accordance with the copyright policy of the publisher. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsexpress.org/abstract.cfm?uri=OE-13-4-1260. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

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