Discrepancy between the times of space charge grating formation and relaxation in photorefractive crystals

A discrepancy between the times of formation and relaxation of space charge gratings is found. This effect is observed when the uniform and nonuniform parts of the optical excitation of the medium appear and disappear simultaneously. It is shown that the formation time of these gratings is always sh...

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Bibliographic Details
Published inTechnical physics Vol. 56; no. 8; pp. 1086 - 1090
Main Author Gusak, N. A.
Format Journal Article
LanguageEnglish
Published Dordrecht SP MAIK Nauka/Interperiodica 01.08.2011
Springer
Subjects
Classical and Continuum Physics
Physics
Physics and Astronomy
Theoretical and Mathematical Physics
Free Carrier
Formation Time
Free Carrier Concentration
Space Charge
Lithium Niobate
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Summary:A discrepancy between the times of formation and relaxation of space charge gratings is found. This effect is observed when the uniform and nonuniform parts of the optical excitation of the medium appear and disappear simultaneously. It is shown that the formation time of these gratings is always shorter than the relaxation time and the higher the light intensity, the greater the discrepancy.
ISSN:1063-7842
1090-6525
DOI:10.1134/S1063784211080123