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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: Franco Gori
  • Vol. 27, Iss. 10 — Oct. 1, 2010
  • pp: 2293–2303

Surface waves and atomic force microscope probe-particle near-field coupling: discrete dipole approximation with surface interaction

Vincent L. Y. Loke and M. Pinar Mengüç  »View Author Affiliations


JOSA A, Vol. 27, Issue 10, pp. 2293-2303 (2010)
http://dx.doi.org/10.1364/JOSAA.27.002293


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Abstract

Evanescent waves on a surface form due to the collective motion of charges within the medium. They do not carry any energy away from the surface and decay exponentially as a function of the distance. However, if there is any object within the evanescent field, electromagnetic energy within the medium is tunneled away and either absorbed or scattered. In this case, the absorption is localized, and potentially it can be used for selective diagnosis or nanopatterning applications. On the other hand, scattering of evanescent waves can be employed for characterization of nanoscale structures and particles on the surface. In this paper we present a numerical methodology to study the physics of such absorption and scattering mechanisms. We developed a MATLAB implementation of discrete dipole approximation with surface interaction (DDA-SI) in combination with evanescent wave illumination to investigate the near-field coupling between particles on the surface and a probe. This method can be used to explore the effects of a number of physical, geometrical, and material properties for problems involving nanostructures on or in the proximity of a substrate under arbitrary illumination.

© 2010 Optical Society of America

OCIS Codes
(240.0240) Optics at surfaces : Optics at surfaces
(050.1755) Diffraction and gratings : Computational electromagnetic methods

ToC Category:
Optics at Surfaces

History
Original Manuscript: June 25, 2010
Revised Manuscript: August 9, 2010
Manuscript Accepted: August 9, 2010
Published: September 28, 2010

Virtual Issues
Vol. 5, Iss. 14 Virtual Journal for Biomedical Optics
September 24, 2010 Spotlight on Optics

Citation
Vincent L. Y. Loke and M. Pinar Mengüç, "Surface waves and atomic force microscope probe-particle near-field coupling: discrete dipole approximation with surface interaction," J. Opt. Soc. Am. A 27, 2293-2303 (2010)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-27-10-2293


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