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|Type:||Artigo de periódico|
|Title:||Photorefractive Saturale Kerr-type Nonlinearity In Photovoltaic Crystals|
|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.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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