Accession Number:

ADA523078

Title:

Study of Fundamental Photoelectric Properties Related to Formation of Holographic Gratings in Photorefractive Materials

Descriptive Note:

Final rept. 30 May 2003-14 Aug 2009

Corporate Author:

RUSSIAN ACADEMY OF SCIENCES SAINT PETERSBURG IOFFE PHYSICAL-TECHNICAL INST

Personal Author(s):

Report Date:

2008-05-01

Pagination or Media Count:

6.0

Abstract:

This report results from a contract tasking A.F. Ioffe Physical-Technical Institute as follows The contractor will investigate the relations between photoelectric and electric properties of several doped noncentrosymmetric crystals, mainly of iron doped lithium niobate crystals, LiNbO3Fe, and their photorefractive properties. Photovoltaic effect, photo- and dark conductivity will be studied experimentally in parallel with studies of formation and other properties of holographic gratings in the samples of LiNbO3Fe, which differ in the stoichiometry of the host LiNb ratio, the concentrations of Fe ions, the Fe2Fe3 ratios, and the concentrations of hydrogen. The experimental results and their theoretical analysis will allow the process of holographic grating formation in LiNbO3Fe to be established on a microscopic level. The distribution of electric fields and charges in holographic gratings will be investigated spectroscopically and the microscopic structure of the Fe-centers dominant in photoelectric and photorefractive properties of LiNbO3Fe crystals will be examined. Also, the photorefractive and photoelectric properties of strontium barium niobate, SrxBa1 xNb2O6 SBN with x0.61, will be studied. The proposed studies are to be conducted with the use of experimental facilities of the Solid State Optics Department of Ioffe Institute.

Subject Categories:

  • Electrooptical and Optoelectronic Devices
  • Ceramics, Refractories and Glass

Distribution Statement:

APPROVED FOR PUBLIC RELEASE