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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 19 — Sep. 13, 2010
  • pp: 19574–19580

Excitation wavelength dependence of phase matched terahertz emission from a GaAs slab

F. Peter, S. Winnerl, H. Schneider, and M. Helm  »View Author Affiliations


Optics Express, Vol. 18, Issue 19, pp. 19574-19580 (2010)
http://dx.doi.org/10.1364/OE.18.019574


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Abstract

We report on phase matched THz emission from GaAs using the anomalous dispersion introduced by optical phonon absorption at the reststrahlenband in GaAs. For this system tunability of the emitted THz frequencies by changing the near infrared excitation wavelength is predicted. We investigate this phenomenon for an oversized double metallized GaAs waveguide. A shift in the THz spectra is observed when the near-infrared wavelength is varied. Enhanced emission is found when phase matching is achieved at 1.4 µm.

© 2010 OSA

OCIS Codes
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(260.3090) Physical optics : Infrared, far

ToC Category:
Nonlinear Optics

History
Original Manuscript: July 6, 2010
Revised Manuscript: August 18, 2010
Manuscript Accepted: August 26, 2010
Published: August 31, 2010

Citation
F. Peter, S. Winnerl, H. Schneider, and M. Helm, "Excitation wavelength dependence of phase matched terahertz emission from a GaAs slab," Opt. Express 18, 19574-19580 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-19-19574


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  23. These simulations were realized by using the commercial finite element solver Comsol.

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