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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Stephen A. Burns
  • Vol. 25, Iss. 2 — Feb. 1, 2008
  • pp: 493–514

Optical response of a single spherical particle in a tightly focused light beam: application to the spatial modulation spectroscopy technique

Jean Lermé, Guillaume Bachelier, Pierre Billaud, Christophe Bonnet, Michel Broyer, Emmanuel Cottancin, Salem Marhaba, and Michel Pellarin  »View Author Affiliations


JOSA A, Vol. 25, Issue 2, pp. 493-514 (2008)
http://dx.doi.org/10.1364/JOSAA.25.000493


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Abstract

We develop a new and numerically efficient formalism to describe the general problem of the scattering and absorption of light by a spherical metal or dielectric particle illuminated by a tightly focused beam. The theory is based on (i) the generalized Mie theory equations, (ii) the plane-wave decomposition of the converging light beam, and (iii) the expansion of a plane wave in terms of vector spherical harmonics. The predictions of the model are illustrated in the case of silver nanoparticles. The results are compared with the Mie theory in the local approximation. Finally, some effects related to the convergence of the beam are analyzed in the context of experiments based on the spatial modulation spectroscopy technique.

© 2008 Optical Society of America

OCIS Codes
(180.0180) Microscopy : Microscopy
(260.0260) Physical optics : Physical optics
(290.0290) Scattering : Scattering
(290.2200) Scattering : Extinction
(290.4020) Scattering : Mie theory
(290.5850) Scattering : Scattering, particles
(300.0300) Spectroscopy : Spectroscopy

ToC Category:
Scattering

History
Original Manuscript: June 5, 2007
Revised Manuscript: September 20, 2007
Manuscript Accepted: September 25, 2007
Published: January 30, 2008

Virtual Issues
Vol. 3, Iss. 3 Virtual Journal for Biomedical Optics

Citation
Jean Lermé, Guillaume Bachelier, Pierre Billaud, Christophe Bonnet, Michel Broyer, Emmanuel Cottancin, Salem Marhaba, and Michel Pellarin, "Optical response of a single spherical particle in a tightly focused light beam: application to the spatial modulation spectroscopy technique," J. Opt. Soc. Am. A 25, 493-514 (2008)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-25-2-493

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