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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 19 — Sep. 17, 2007
  • pp: 11984–11998

Optical trapping of nonspherical particles in the T-matrix formalism

Ferdinando Borghese, Paolo Denti, Rosalba Saija, and Maria Antonia Iatì  »View Author Affiliations

Optics Express, Vol. 15, Issue 19, pp. 11984-11998 (2007)

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The theory of the trapping of nonspherical particles in the focal region of a high-numerical-aperture optical system is formulated in the framework of the transition matrix approach. Both the case of an unaberrated lens and the case of an aberrated one are considered. The theory is applied to single latex spheres of various sizes and, when the results are compared with the available experimental data, a fair agreement is attained. The theory is also applied to binary clusters of spheres of latex with a diameter of 220nm in various orientations. Although, in this case we have no experimental data to which our results can be compared, we get useful indications for the trapping of nonspherical particles. In particular, we find substantial agreement with recent results on the trapping of prolate spheroids in aberrated gaussian fields [S. H. Simpson and S. Hanna, J. Opt. Soc. Am. A 24, 430 (2007)].

© 2007 Optical Society of America

OCIS Codes
(140.7010) Lasers and laser optics : Laser trapping
(260.2110) Physical optics : Electromagnetic optics
(260.2160) Physical optics : Energy transfer
(290.0290) Scattering : Scattering

ToC Category:

Original Manuscript: July 23, 2007
Revised Manuscript: August 27, 2007
Manuscript Accepted: September 1, 2007
Published: September 5, 2007

Virtual Issues
Vol. 2, Iss. 10 Virtual Journal for Biomedical Optics

Ferdinando Borghese, Paolo Denti, Rosalba Saija, and Maria A. Iatì, "Optical trapping of nonspherical particles in the T-matrix formalism," Opt. Express 15, 11984-11998 (2007)

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