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American Institute of Physics, Journal of Applied Physics, 16(114), p. 163506

DOI: 10.1063/1.4826628

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Raman frequency shift induced by photorefractive effect on Fe-doped lithium niobate

Journal article published in 2013 by M. Bazzan, N. Kokanyan, A. Zaltron, N. Argiolas ORCID, D. Chapron, M. D. Fontana
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This paper is available in a repository.

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Abstract

We report on the observation of a time dependent frequency shift of the Raman modes in photorefractive Fe:LiNbO3. The origin of this shift is attributed primarily to the space charge field which builds up due to photo-induced charge transport by the excitation beam, and to the subsequent piezo-induced strain. This phenomenon can be regarded as the Raman analogous of the photorefractive effect, in which the space charge field is detected by an electro-optic variation of the refractive index. It should be possible therefore to analyze it using standard models for photorefractivity. In this paper, we verify this claim discussing its validity.