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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 9 — Apr. 27, 2009
  • pp: 7419–7430

An integral equation based numerical solution for nanoparticles illuminated with collimated and focused light

Kürşat Şendur  »View Author Affiliations


Optics Express, Vol. 17, Issue 9, pp. 7419-7430 (2009)
http://dx.doi.org/10.1364/OE.17.007419


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Abstract

To address the large number of parameters involved in nano-optical problems, a more efficient computational method is necessary. An integral equation based numerical solution is developed when the particles are illuminated with collimated and focused incident beams. The solution procedure uses the method of weighted residuals, in which the integral equation is reduced to a matrix equation and then solved for the unknown electric field distribution. In the solution procedure, the effects of the surrounding medium and boundaries are taken into account using a Green’s function formulation. Therefore, there is no additional error due to artificial boundary conditions unlike differential equation based techniques, such as finite difference time domain and finite element method. In this formulation, only the scattering nano-particle is discretized. Such an approach results in a lesser number of unknowns in the resulting matrix equation. The results are compared to the analytical Mie series solution for spherical particles, as well as to the finite element method for rectangular metallic particles. The Richards-Wolf vector field equations are combined with the integral equation based formulation to model the interaction of nanoparticles with linearly and radially polarized incident focused beams.

© 2009 Optical Society of America

OCIS Codes
(000.4430) General : Numerical approximation and analysis

ToC Category:
Scattering

History
Original Manuscript: December 19, 2008
Revised Manuscript: March 6, 2009
Manuscript Accepted: March 21, 2009
Published: April 21, 2009

Citation
Kursat Sendur, "An integral equation based numerical solution for nanoparticles illuminated with collimated and focused light," Opt. Express 17, 7419-7430 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-9-7419


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