Photoconductivity parameters in lithium niobate
- 15 November 1986
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 60 (10), 3553-3557
- https://doi.org/10.1063/1.337611
Abstract
Measurements on a variety of doped (magnesium and/or iron) and undoped lithium niobate crystals in the oxidized state demonstrate an Arrhenius dependence of dark conductivity on reciprocal temperature between 460 and 590 K. All of the crystals had roughly the same conductivity and activation energy (1.21 eV) over the temperature range, implying that all have about the same free-carrier concentration and mobility. The enhanced photoconductivity of magnesium-doped lithium niobate is attributed to a greatly reduced trapping cross section of Fe3+ for electrons, the smaller cross section being due to a changed substitutional site for Fe3+. The Fe3+ trapping cross section is calculated from photoconductivity data to be of order 10−18 m2 in undoped lithium niobate. This implies a photoelectron lifetime of order 6×10−11 s in a relatively pure (2-ppm Fe) oxidized crystal.Keywords
This publication has 18 references indexed in Scilit:
- LiNbO3+9%Mg2+Japanese Journal of Applied Physics, 1985
- Increased optical damage resistance in lithium niobateApplied Physics Letters, 1984
- The photovoltaic effect and the charge transport in LiNbO3Ferroelectrics, 1978
- Electron Hall Mobility in Reduced LiNbO3Japanese Journal of Applied Physics, 1976
- Optical absorption edge of LiNbO3Journal of Applied Physics, 1974
- High-voltage bulk photovoltaic effect and the photorefractive process in LiNbO3Applied Physics Letters, 1974
- Fe-Doped LiNbO_3 for Read–Write ApplicationsApplied Optics, 1974
- On the disorder of LiNbO3 crystalsPhysica Status Solidi (a), 1972
- Control of the Susceptibility of Lithium Niobate to Laser-Induced Refractive Index ChangesApplied Physics Letters, 1971
- SPATIALLY UNIFORM AND ALTERABLE SHG PHASE-MATCHING TEMPERATURES IN LITHIUM NIOBATEApplied Physics Letters, 1970