Open AccessMethods for controlling of the laser-induced absorption in a BTO crystal by using of cw-laser radiation
Author(s) -
A. Matusevich,
А. Л. Толстик,
M. G. Kisteneva,
С. М. Шандаров,
V. Matusevich,
A. Kießling,
R. Kowarschik
Publication year - 2009
Publication title -
applied physics b
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.591
H-Index - 131
eISSN - 1432-0649
pISSN - 0946-2171
DOI - 10.1007/s00340-009-3512-1
Subject(s) - laser , materials science , radiation , optics , quantum optics , redistribution (election) , absorption (acoustics) , wavelength , photorefractive effect , crystal (programming language) , electron , atomic physics , optoelectronics , physics , quantum mechanics , politics , political science , law , computer science , programming language
A photorefractive BTO crystal is exposed with cw-laser beams (430 mW/cm2 at 514 nm), and the photo-induced absorption between 480 and 900 nm is studied. A method of controlling this absorption by low intensity laser radiation of “green” and “red” wavelengths is demonstrated. The physical mechanism can be explained by the redistribution of electrons on the long-lived energy levels into the forbidden band. Dynamical characteristics of the redistribution are estimated.
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