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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 15, Iss. 7 — Jul. 1, 1998
  • pp: 2045–2056

Hot-carrier-transport-governed nonresonant optical nonlinearity: transient Gunn-domain grating

L. Subacius, E. Starikov, P. Shiktorov, V. Gruzinskis, and K. Jarasiunas  »View Author Affiliations


JOSA B, Vol. 15, Issue 7, pp. 2045-2056 (1998)
http://dx.doi.org/10.1364/JOSAB.15.002045


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Abstract

We review recent investigations of nonlinear carrier transport and related optical nonlinearities in GaAs and InP crystals for the case in which photoexcited carriers are nonuniformly heated by a strong external electric field and are redistributed in a spatially nonuniform internal electric field. We simulated the nonequilibrium carrier and internal field spatial evolution in picosecond and nanosecond time domains and estimated criteria for bipolar high-field Gunn-domain grating formation in dc and ac fields. The coexisting refractive-index modulation mechanisms for free-carrier and electro-optic nonlinearities are analyzed for various external field strengths, grating periods, and excitation levels, thus providing conditions for an efficient and fast electro-optic refractive-index modulation by the transient Gunn-domain grating. Comparison of the experimentally observed enhancement of light s self-diffraction efficiency with numerical calculations has confirmed that the nonresonant electro-optic Gunn-domain-based nonlinearity may exceed the free-carrier nonlinearity. 1998 Optical Society of America S0740-3224(98)02207-3

[Optical Society of America ]

OCIS Codes
(160.6000) Materials : Semiconductor materials
(190.0190) Nonlinear optics : Nonlinear optics
(300.2570) Spectroscopy : Four-wave mixing

Citation
L. Subacius, E. Starikov, P. Shiktorov, V. Gruzinskis, and K. Jarasiunas, "Hot-carrier-transport-governed nonresonant optical nonlinearity: transient Gunn-domain grating," J. Opt. Soc. Am. B 15, 2045-2056 (1998)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-15-7-2045

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