Giant enhancement of the non-steady-state photo currents in photoconductive crystals

Igor A. Sokolov; Vladimir V. Kulikov; Mikhail A. Bryushinin

doi:10.1117/12.530021

19 November 2003 Giant enhancement of the non-steady-state photo currents in photoconductive crystals

Igor A. Sokolov, Vladimir V. Kulikov, Mikhail A. Bryushinin

Proceedings Volume 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life; (2003) https://doi.org/10.1117/12.530021
Event: 19th Congress of the International Commission for Optics: Optics for the Quality of Life, 2002, Florence, Italy

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.

Citation Download Citation

Igor A. Sokolov, Vladimir V. Kulikov, and Mikhail A. Bryushinin "Giant enhancement of the non-steady-state photo currents in photoconductive crystals", Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); https://doi.org/10.1117/12.530021

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