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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Henry M. Van Driel
  • Vol. 24, Iss. 7 — Jul. 1, 2007
  • pp: 1557–1563

Polarization-dependent nonlinear refraction and two-photon absorption in GaAs AlAs superlattice waveguides below the half-bandgap

Sean J. Wagner, Joachim Meier, A. S. Helmy, J. Stewart Aitchison, Marc Sorel, and David C. Hutchings  »View Author Affiliations

JOSA B, Vol. 24, Issue 7, pp. 1557-1563 (2007)

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Values for the two-photon absorption coefficient, α 2 , and nonlinear refractive index coefficients, n 2 , are measured for a waveguide core made of 14:14 monolayer GaAs AlAs superlattice at photon energies below the half-bandgap. Two-photon absorption coefficients show significant anisotropy with the TE mode having α 2 values up to four times greater than the TM mode. For nonlinear refraction, we determined values of the nonlinear index for the TE mode that are as much as two times larger than the TM mode. Measurements of cross-phase modulation between the TE and TM modes gave ratios of cross-phase modulation to self-phase modulation that were highly anisotropic.

© 2007 Optical Society of America

OCIS Codes
(160.4330) Materials : Nonlinear optical materials
(190.5970) Nonlinear optics : Semiconductor nonlinear optics including MQW

ToC Category:
Nonlinear Optics

Original Manuscript: September 29, 2006
Manuscript Accepted: January 8, 2007
Published: June 15, 2007

Sean J. Wagner, Joachim Meier, A. S. Helmy, J. Stewart Aitchison, Marc Sorel, and David C. Hutchings, "Polarization-dependent nonlinear refraction and two-photon absorption in GaAs/AlAs superlattice waveguides below the half-bandgap," J. Opt. Soc. Am. B 24, 1557-1563 (2007)

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