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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 5 — Feb. 28, 2011
  • pp: 3973–3983

Ultrafast nonlinear optical spectroscopy of a dual-band negative index metamaterial all-optical switching device

Keshav M. Dani, Zahyun Ku, Prashanth C. Upadhya, Rohit P. Prasankumar, Antoinette J. Taylor, and S. R. J. Brueck  »View Author Affiliations

Optics Express, Vol. 19, Issue 5, pp. 3973-3983 (2011)

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We study the nonlinear optical response of a fishnet structure-metamaterial all-optical switching device that exhibits two near-infrared negative-index resonances. We study and compare the nonlinear optical response at both resonances and identify transient spectral features associated with the negative index resonance. We see a significantly stronger response at the longer wavelength resonance, but identical temporal dynamics at both resonances, providing insight into separately engineering the switching time and switching ratio of such a fishnet structure metamaterial all-optical switch. We also numerically reproduce the nonlinear behavior of our device using the Drude conductivity model and a finite integration technique over wide spectral and pump fluence ranges. Thereby, we show that beyond the linear properties of the device, the magnitude of the pump-probe response is completely described by only two material parameters. These results provide insight into engineering various aspects of the nonlinear response of fishnet structure metamaterials.

© 2011 OSA

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(160.3918) Materials : Metamaterials
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:

Original Manuscript: November 9, 2010
Revised Manuscript: February 7, 2011
Manuscript Accepted: February 10, 2011
Published: February 15, 2011

Keshav M. Dani, Zahyun Ku, Prashanth C. Upadhya, Rohit P. Prasankumar, Antoinette J. Taylor, and S. R. J. Brueck, "Ultrafast nonlinear optical spectroscopy of a dual-band negative index metamaterial all-optical switching device," Opt. Express 19, 3973-3983 (2011)

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