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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 7 — Apr. 3, 2006
  • pp: 2909–2920

Optical response of periodically modulated nanostructures near the interband transition threshold of noble metals

V. Halté, A. Benabbas, and J.-Y. Bigot  »View Author Affiliations


Optics Express, Vol. 14, Issue 7, pp. 2909-2920 (2006)
http://dx.doi.org/10.1364/OE.14.002909


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Abstract

We investigate the influence of the core d-electrons on the spectral optical response of arrays of sub-wavelength holes near the transition from the d-band to the Fermi level of noble metals (d→EF). Our model shows that, due to the dispersion of the metal dielectric function near d→EF, the first order peaks in the enhanced spectral transmission shift nonlinearly as a function of the period of the nanostructure. In addition, we outline in that spectral region an apparent large resonance which does not depend on the geometrical parameters of the nanostructure. It is shown to correspond to the transparency window resulting from the spectral superposition of the large absorption associated to the core d-electrons and high reflectivity due to the conduction electrons. The analysis is performed for gold, copper and silver nanostructures.

© 2006 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(240.0240) Optics at surfaces : Optics at surfaces
(240.6680) Optics at surfaces : Surface plasmons
(260.3910) Physical optics : Metal optics

ToC Category:
Optics at Surfaces

History
Original Manuscript: March 1, 2006
Revised Manuscript: March 20, 2006
Manuscript Accepted: March 20, 2006
Published: April 3, 2006

Citation
V. Halté, A. Benabbas, and J.-Y. Bigot, "Optical response of periodically modulated nanostructures near the interband transition threshold of noble metals," Opt. Express 14, 2909-2920 (2006)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-14-7-2909


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