Holographic scattering in the ultraviolet spectral range in iron-doped lithium niobateM. A. Ellabban1, Th. Woike2, M. Fally1 and R. A. Rupp1
1 Institut für Experimentalphysik, Universität Wien Boltzmanngasse 5, A-1090 Wien, Austria
2 Institut für Mineralogie, Universität zu Köln Zülpicherstr. 49b, D-50674 Köln, Germany
received 16 November 2004; accepted in final form 22 March 2005
published online 13 April 2005
Photo-induced light scattering in iron-doped lithium niobate crystals is investigated at different wavelengths in the near ultraviolet spectral range. We observed a remarkable difference of the angular distribution of scattered light when changing the pump wavelength. These findings can be explained by the spectral dependence of the competing recording mechanisms photovoltaic effect and diffusion. We found that the magnitude of the photovoltaic effect is decreasing from 364 to 334, and diffusion becomes the dominant charge transport mechanism for photorefraction.
42.25.Fx - Diffraction and scattering.
42.40.Ht - Hologram recording and readout methods.
42.65.Hw - Phase conjugation; photorefractive and Kerr effects.
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