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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 10 — May. 12, 2008
  • pp: 7471–7480

Wavelength dispersion of nonlinear dielectric function of Cu nanoparticle materials

Yoshihiko Takeda, Hiroyoshi Momida, Masato Ohnuma, Takahisa Ohno, and Naoki Kishimoto  »View Author Affiliations


Optics Express, Vol. 16, Issue 10, pp. 7471-7480 (2008)
http://dx.doi.org/10.1364/OE.16.007471


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Abstract

The wavelength dispersions of third-order nonlinear optical response for Cu nanoparticle materials have been experimentally evaluated from transient spectra measured with the pump-probe method. The evaluated dispersions were analyzed on hot electron contribution using the Maxwell-Garnett approximation with the Drude model for intraband transition and first principles calculation for interband transition. The wavelength dispersion didn’t directly reflect the dispersion of a local electric field factor. The interband transition term in hot electron contribution strongly dominated the dispersion around the surface plasmon resonance by Fermi smearing. Intrinsic interband contribution to the nonlinearity was suggested from the analysis. Particle-size and host-medium dependence of the nonlinearity were also simulated.

© 2008 Optical Society of America

OCIS Codes
(190.4720) Nonlinear optics : Optical nonlinearities of condensed matter

ToC Category:
Nonlinear Optics

History
Original Manuscript: April 22, 2008
Revised Manuscript: May 6, 2008
Manuscript Accepted: May 7, 2008
Published: May 8, 2008

Citation
Yoshihiko Takeda, Hiroyoshi Momida, Masato Ohnuma, Takahisa Ohno, and Naoki Kishimoto, "Wavelength dispersion of nonlinear dielectric function of Cu nanoparticle materials," Opt. Express 16, 7471-7480 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-10-7471


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