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Proceedings Paper

Giant enhancement of the non-steady-state photo currents in photoconductive crystals
Author(s): Igor A. Sokolov; Vladimir V. Kulikov; Mikhail A. Bryushinin
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Paper Abstract

We report the nonresonant excitation of the non-steady-state photocurrents in an external sinusoidal electric field. We demonstrate that the application of an AC field sufficiently increases the photocurrent amplitude. At the same time the frequency transfer function of the effect maintains the form typical for the diffusion mechanism of photocurrent excitation. The dependencies of the current amplitude and characteristic cut-off frequency versus applied voltage are utilized for the determination of the photocarrier's μτ-product. The advantages of the proposed technique are discussed. The experiments are carried out in the photorefractive n-type Bi12SiO20 crystal. The signal enhancement of 50 dB has been achieved and μτ-product is found to be μτ = (0.8 - 1.2) 10-10 m2/V.

Paper Details

Date Published: 19 November 2003
PDF: 2 pages
Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); doi: 10.1117/12.530021
Show Author Affiliations
Igor A. Sokolov, A.F. Ioffe Physico-Technical Institute (Russia)
Vladimir V. Kulikov, A.F. Ioffe Physico-Technical Institute (Russia)
Mikhail A. Bryushinin, A.F. Ioffe Physico-Technical Institute (Russia)

Published in SPIE Proceedings Vol. 4829:
19th Congress of the International Commission for Optics: Optics for the Quality of Life
Giancarlo C. Righini; Anna Consortini, Editor(s)

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