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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 17, Iss. 12 — Dec. 1, 2000
  • pp: 1986–1991

Non-steady-state photoelectromotive force effect in photorefractive Sn2P2S6 crystals

Ismael Seres, Serguei Stepanov, Svetlana Mansurova, and Alexander Grabar  »View Author Affiliations

JOSA B, Vol. 17, Issue 12, pp. 1986-1991 (2000)

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Results of experimental investigation of the non-steady-state photoelectromotive-force effect in ferroelectric photorefractive Sn2P2S6 crystals at a wavelength of 633 nm are reported. The dominating photoconductivity proved to be of the p type, with a diffusion length of photocarriers of ∼1 µm. This characteristic length proved to be shorter than the Debye-screening length evaluated as ∼3 µm in this crystal. The millisecond characteristic time of the space-charge grating formation was determined by the photoconductivity-relaxation time, which was found to be a little bit longer than the dielectric-relaxation time. Both of them dropped sublinearly with increasing average light intensity in the investigated region I00.50.01 mW/mm2.

© 2000 Optical Society of America

OCIS Codes
(040.5350) Detectors : Photovoltaic
(160.5140) Materials : Photoconductive materials
(160.5320) Materials : Photorefractive materials

Ismael Seres, Serguei Stepanov, Svetlana Mansurova, and Alexander Grabar, "Non-steady-state photoelectromotive force effect in photorefractive Sn2P2S6 crystals," J. Opt. Soc. Am. B 17, 1986-1991 (2000)

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