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Selected Works of James A. Lock
Article
Calculation of the Radiation Trapping Force for Laser Tweezers by Use of Generalized Lorenz-Mie Theory. II. On-Axis Trapping Force
Applied Optics
  • James A. Lock, Cleveland State University
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Document Type
Article
Publication Date
4-20-2004
Disciplines
Abstract

The efficiency of trapping an on-axis spherical particle by use of laser tweezers for a particle size from the Rayleigh limit to the ray optics limit is calculated from generalized Lorenz-Mie light-scattering theory and the localized version of a Gaussian beam that has been truncated and focused by a high-numericalaperture lens and that possesses spherical aberration as a result of its transmission through the wall of the sample cell. The results are compared with both the experimental trapping efficiency and the theoretical efficiency obtained from use of the localized version of a freely propagating focused Gaussian beam. The predicted trapping efficiency is found to decrease as a function of the depth of the spherical particle in the sample cell owing to an increasing amount of spherical aberration. The decrease in efficiency is also compared with experiment. (C) 2004 Optical Society of America

DOI
10.1364/AO.43.002545
Version
Publisher's PDF
Publisher's Statement
This paper was published in Applied Optics 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.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-12-2545. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Citation Information
Lock, James A. "Calculation of the Radiation Trapping Force for Laser Tweezers by Use of Generalized Lorenz-Mie Theory. II. On-Axis Trapping Force." Applied Optics 43 (2004): 2545-2554.