Transient Diffraction Efficiency and the Role of the Deep Center Levels in BaTiO3 Crystal

Corresponding Author : Y. Haque (

Abstract :

The charge transport model has been applied to the photorefractive crystal. Shallow & Deep levels have been accounted for in the formulation of the charge transport equations. It is assumed that the writing beams excite the shallow level charges where as the electrons from the deep level are the ones excited into the conduction band by the reading beam. An appreciable fraction of these electrons recombine with the deep level holes. The electron-hole recombination rate is dependent on the excitation…

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