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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 18 — Sep. 3, 2007
  • pp: 11481–11491

Optical near-field analysis of spherical metals: Application of the FDTD method combined with the ADE method

Takashi Yamaguchi and Takashi Hinata  »View Author Affiliations


Optics Express, Vol. 15, Issue 18, pp. 11481-11491 (2007)
http://dx.doi.org/10.1364/OE.15.011481


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Abstract

The time-average energy density of the optical near-field generated around a metallic sphere is computed using the finite-difference time-domain method. To check the accuracy, the numerical results are compared with the rigorous solutions by Mie theory. The Lorentz-Drude model, which is coupled with Maxwell’s equation via motion equations of an electron, is applied to simulate the dispersion relation of metallic materials. The distributions of the optical near-filed generated around a metallic hemisphere and a metallic spheroid are also computed, and strong optical near-fields are obtained at the rim of them.

© 2007 Optical Society of America

OCIS Codes
(000.4430) General : Numerical approximation and analysis
(240.6680) Optics at surfaces : Surface plasmons
(260.2030) Physical optics : Dispersion
(260.2110) Physical optics : Electromagnetic optics
(290.4020) Scattering : Mie theory

ToC Category:
Optics at Surfaces

History
Original Manuscript: June 26, 2007
Revised Manuscript: August 17, 2007
Manuscript Accepted: August 18, 2007
Published: August 24, 2007

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

Citation
Takashi Yamaguchi and Takashi Hinata, "Optical near-field analysis of spherical metals: Application of the FDTD method combined with the ADE method," Opt. Express 15, 11481-11491 (2007)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-18-11481


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