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|Type:||Artigo de periódico|
|Title:||Holographic recording and characterization of photorefractive Bi2TeO5 crystals at 633 nm wavelength light|
|Author:||de Oliveira, I|
|Abstract:||We report on the holographic recording on photorefractive Bi2TeO5 crystals using lambda = 633 nm wavelength light. We studied the behavior of this material under the action of this low photonic energy light and found out the presence of a fast and a slow hologram, both of photorefractive nature and exhibiting rather high diffraction efficiencies. The faster and the slower holograms are based on the excitation and diffusion of oppositely charged carriers (likely electrons and holes). Relevant parameters for the photoactive centers responsible for both kind of holograms were characterized using purely holographic techniques. No evidences of non-photosensitive ionic charge carriers being involved in the recording process at room temperature nor self-fixing effects were found. (C) 2014 AIP Publishing LLC.|
|Editor:||Amer Inst Physics|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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