Accession Number : ADP006748

Title :   Non-Steady-State PhotoEMF in Crystals with Long Relaxation Times of Photoconductivity,

Corporate Author : AKADEMIYA NAUK SSSR LENINGRAD FIZIKO-TEKHNICHESKII INSTITUT

Personal Author(s) : Sokolov, I. A. ; Stepanov, S. I.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : The recently discovered effect of non-steady-state photo(EMF) is a powerful technique for the measurement of different parameters of photorefractive crystals. The photoEMF is observed as an alternating electric current J to the omega through a short-circuited sample of photoconductor illuminated by a vibrating pattern of interference between two coherent waves, one of-which is phase modulated with frequency omega. It results from a periodic modulation of the spatial shift between the distribution of photoconductivity that follows movements of the interference pattern and the distribution of the space-charge electric field recorded through the conventional diffusion holographic mechanism in photorefractive crystals.

Descriptors :   CRYSTALS, DIFFUSION, DISTRIBUTION, ELECTRIC CURRENT, ELECTRIC FIELDS, FREQUENCY, INTERFERENCE, MEASUREMENT, MODULATION, PARAMETERS, PHOTOCONDUCTIVITY, PHOTOCONDUCTORS, SPACE CHARGE, STEADY STATE, HOLOGRAPHY, ILLUMINATION, HARMONICS, REFRACTION, SYMPOSIA.

Subject Categories : Optics
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE