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Type: Artigo de periódico
Title: Photo-electromotive-force from volume speckle pattern vibration with large amplitude
Author: dos Santos, TO
Launay, JC
Frejlich, J
Abstract: We report an accurate mathematical model describing the photo-electromotive-force signal produced by a speckle pattern of light vibrating in the volume of a photorefractive crystal with a large transverse amplitude. Our model shows that, for vibrations much faster than the material response time, the first harmonic term of the photo-electromotive-force signal exhibits a maximum at a characteristic value of the vibration-amplitude-to-speckle-size ratio that depends on the dark-to-photoconductivity ratio in the material. The theoretical results are in good agreement with experimental data from a vanadium-doped photorefractive CdTe (CdTe:V) crystal under 1064 nm wavelength illumination. (C) 2008 American Institute of Physics.
Country: EUA
Editor: Amer Inst Physics
Rights: aberto
Identifier DOI: 10.1063/1.2938061
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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