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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 15 — Jul. 21, 2008
  • pp: 11611–11617

Surface plasmon dynamics in arrays of subwavelength holes: the role of optical interband transitions

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


Optics Express, Vol. 16, Issue 15, pp. 11611-11617 (2008)
http://dx.doi.org/10.1364/OE.16.011611


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Abstract

Using femtosecond optical spectroscopy, we study the ultrafast dynamics of the surface plasmon polaritons in gold arrays of subwavelength holes. A large time dependent spectral broadening and shift of the surface plasmon resonances are reported. The experimental results are modeled by the diffraction of a transverse electromagnetic field through the nanostructure, taking into account both the electron dynamics near the interband transitions and the Drude-like conductivity of the metal. Our analysis, using either a theoretical or an experimentally determined dielectric function of gold, suggests that the losses propagation in plasmonic devices is strongly influenced by intrinsic and extrinsic electron scattering mechanisms.

© 2008 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(240.6680) Optics at surfaces : Surface plasmons
(260.3910) Physical optics : Metal optics
(320.7150) Ultrafast optics : Ultrafast spectroscopy

ToC Category:
Optics at Surfaces

History
Original Manuscript: April 1, 2008
Revised Manuscript: April 23, 2008
Manuscript Accepted: April 24, 2008
Published: July 18, 2008

Citation
V. Halté, A. Benabbas, and J.-Y. Bigot, "Surface plasmon dynamics in arrays of subwavelength holes: the role of optical interband transitions," Opt. Express 16, 11611-11617 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-15-11611


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