Accession Number : ADP006744

Title :   Polarization Properties of Bi sub 12 Sio sub 20 Crystals,

Corporate Author : DNEPROPETROVSK STATE UNIV (USSR) DEPT OF PHYSICS

Personal Author(s) : Panchenko, T. ; Kudzin, A. ; Potapovich, Y. ; Snejnoy, G.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : Photorefractive crystals Bi12SiO20 (BSO) are particular interest for applications such as spatial light modulators, image amplification and the like. Some properties are connected to distribution of space charge induced in the crystal both by an applied (or intrinsic) electric field and illumination. Many electrical and optical properties as BSO dependence on density and king of localized states. In these paper the results of study of both photoelectret and thermoelectret state (PES and TES) and intrinsic charge distribution as were are presented. The many features of electrets state was carried out by thermally stimulated depolarization (TSD) in temperature range 300-800 K. The potential distribution was determined by point electrical probe method - with 30 um accuracy. The thermo and photoelectrets was formed by polarization in external electric field (U sub p = 0.01-1 kV) in temperature range 300-600 K in dark or under illumination lambda sub p = 0.38-0.63 microns).

Descriptors :   *OPTICAL PROPERTIES, AMPLIFICATION, CRYSTALS, DENSITY, DISTRIBUTION, ELECTRETS, ELECTRIC FIELDS, EXTERNAL, ILLUMINATION, IMAGES, LIGHT, LIGHT MODULATORS, MODULATORS, POLARIZATION, PROBES, SPACE CHARGE, TEMPERATURE.

Subject Categories : Optics
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE