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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 10 — May. 16, 2005
  • pp: 3707–3718

Computation of the optical trapping force using an FDTD based technique

Robert C. Gauthier  »View Author Affiliations


Optics Express, Vol. 13, Issue 10, pp. 3707-3718 (2005)
http://dx.doi.org/10.1364/OPEX.13.003707


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Abstract

The computation details related to computing the optical radiation pressure force on various objects using a 2-D grid FDTD algorithm are presented. The technique is based on propagating the electric and magnetic fields through the grid and determining the changes in the optical energy flow with and without the trap object(s) in the system. Traces displayed indicate that the optical forces and FDTD predicted object behavior are in agreement with published experiments and also determined through other computation techniques. We show computation results for a high and low dielectric disc and thin walled shell. The FDTD technique for computing the light-particle force interaction may be employed in all regimes relating particle dimensions to source wavelength. The algorithm presented here can be easily extended to 3-D and include torque computation algorithms, thus providing a highly flexible and universally useable computation engine.

© 2005 Optical Society of America

OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.7010) Lasers and laser optics : Laser trapping

ToC Category:
Research Papers

History
Original Manuscript: April 6, 2005
Revised Manuscript: May 2, 2005
Published: May 16, 2005

Citation
Robert Gauthier, "Computation of the optical trapping force using an FDTD based technique," Opt. Express 13, 3707-3718 (2005)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-13-10-3707


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