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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 29, Iss. 9 — Sep. 1, 2012
  • pp: 2630–2642

Competition between electronic Kerr and free-carrier effects in an ultimate-fast optically switched semiconductor microcavity

Emre Yüce, Georgios Ctistis, Julien Claudon, Emmanuel Dupuy, Klaus J. Boller, Jean-Michel Gérard, and Willem L. Vos  »View Author Affiliations


JOSA B, Vol. 29, Issue 9, pp. 2630-2642 (2012)
http://dx.doi.org/10.1364/JOSAB.29.002630


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Abstract

We have performed ultrafast pump–probe experiments on a GaAs–AlAs microcavity with a resonance near 1300 nm in the “Original” telecom band. We concentrate on ultimate-fast optical switching of the cavity resonance that is measured as a function of pump-pulse energy. We observe that, at low pump-pulse energies, the switching of the cavity resonance is governed by the instantaneous electronic Kerr effect and is achieved within 300 fs. At high pump-pulse energies, the index change induced by free carriers generated in the GaAs start to compete with the electronic Kerr effect and reduce the resonance frequency shift. We have developed an analytic model that predicts this competition in agreement with the experimental data. To this end, we derive the nondegenerate two- and three-photon absorption coefficients for GaAs. Our model includes a new term in the intensity-dependent refractive index that considers the effect of the probe-pulse intensity, which is resonantly enhanced by the cavity. We calculate the effect of the resonantly enhanced probe light on the refractive index change induced by the electronic Kerr effect for cavities with different quality factors. By exploiting the linear regime where only the electronic Kerr effect is observed, we manage to retrieve the nondegenerate third-order nonlinear susceptibility χ ( 3 ) for GaAs from the cavity resonance shift as a function of pump-pulse energy.

© 2012 Optical Society of America

OCIS Codes
(190.3270) Nonlinear optics : Kerr effect
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(130.4815) Integrated optics : Optical switching devices
(200.6715) Optics in computing : Switching

ToC Category:
Nonlinear Optics

History
Original Manuscript: May 1, 2012
Revised Manuscript: July 12, 2012
Manuscript Accepted: July 13, 2012
Published: August 31, 2012

Citation
Emre Yüce, Georgios Ctistis, Julien Claudon, Emmanuel Dupuy, Klaus J. Boller, Jean-Michel Gérard, and Willem L. Vos, "Competition between electronic Kerr and free-carrier effects in an ultimate-fast optically switched semiconductor microcavity," J. Opt. Soc. Am. B 29, 2630-2642 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-9-2630

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