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|Type:||Artigo de periódico|
|Title:||Charge-carrier diffusion length in photorefractive crystals computed from the initial hologram phase shift|
|Abstract:||The plane shift between the pattern of light onto a photorefractive crystal and the resulting hologram at the very beginning of the recording process in two-wave mixing is analyzed and measured as a function of the applied electric field. These data allow one to compute the diffusion length of photoexcited charge carriers and to evaluate the actual electric field inside the crystal. A diffusion length of 0.14 mu m is measured in a nominally undoped photorefractive Bi12TiO20 crystal using a 532 nm wavelength laser illumination, in agreement with results obtained from other methods. (C) 1997 American Institute of Physics. [S0003-6951(97)02243-2].|
|Editor:||Amer Inst Physics|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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