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Type: Artigo de periódico
Title: Photorefractive saturable Kerr-type nonlinearity in photovoltaic crystals
Author: Bian, S
Frejlich, J
Ringhofer, KH
Abstract: We deduce the equation describing the refractive index perturbation in photovoltaic photorefractive crystals produced by the incidence of a focused laser beam and an incoherent uniform illumination. Under short-circuit conditions the equation shows a saturable Kerr-type nonlinearity that can be controlled by the intensity of the uniform background illumination. Z-scan experiments in an iron doped lithium niobate crystal are carried out using a 532 nm wavelength laser line to evaluate its self-lensing properties and to measure its photovoltaic field.
Country: EUA
Editor: American Physical Soc
Rights: aberto
Identifier DOI: 10.1103/PhysRevLett.78.4035
Date Issue: 1997
Appears in Collections:Unicamp - Artigos e Outros Documentos

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