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Solitonic coherent interactions in photorefractive iron doped indium phosphide (InP:Fe )

M. Alonzo, Cristian Dan, Delphine Wolfersberger, E. Fazio

Published Oct 1, 2008• 0 citations
OpenAlex

Abstract

We report experimental evidences about coherent solitonic collisions in photorefractive semiconductor InP:Fe, investigating the effects of temperature, light intensity and external electric field on the trapping processes.

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Iron-ion concentrations have been determined from measurements of the photoinduced-grating erasure times. We checked the accuracy of this method by performing two-wave mixing experiments at λ = 1.32 μm without an applied field. After verifying the fit of the extended single-defect model with indirect transitions and the two-wave mixing gain data at λ = 1.06 μm, we conclude that the indirect transitions involving the excited state of Fe2+ can induce a reduction of the photorefractive effect in InP:Fe when the dominant photocarriers are holes at room temperature.