Observation of the Photoinduced Conductivity in a Regular Domain Structure with Tilted Walls in MgO:LiNbO3 at a Wavelength of 632.8 nm at Bragg Diffraction

Observation of the Photoinduced Conductivity in a Regular Domain Structure with Tilted Walls in MgO:LiNbO3 at a Wavelength of 632.8 nm at Bragg Diffraction

A 632.8-nm radiation-induced change in the conductivity of a regular domain structure (RDS) formed in a 5% MgO:LiNbO 3 crystal has been detected for the first time. As a result, the relaxation rate for the Bragg diffraction efficiency on the RDS, which is observed after the application of an externa...

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Bibliographic Details
Published in:JETP letters Vol. 112; no. 10; pp. 602 - 606
Main Authors: Savchenkov, E. N., Dubikov, A. V., Sharaeva, A. E., Burimov, N. I., Shandarov, S. M., Esin, A. A., Akhmatkhanov, A. R., Shur, V. Ya
Format: Journal Article
Language:English
Published: Moscow Pleiades Publishing 01-11-2020
Springer Nature B.V
Subjects:
Atomic
Biological and Medical Physics
Biophysics
Crystal structure
Diffraction
Diffraction efficiency
Domain walls
Electric fields
Lithium niobates
Magnesium oxide
Molecular
Optical and Plasma Physics
Optics and Laser Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Quantum Information Technology
Radiation effects
Solid State Physics
Spintronics
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Summary:A 632.8-nm radiation-induced change in the conductivity of a regular domain structure (RDS) formed in a 5% MgO:LiNbO 3 crystal has been detected for the first time. As a result, the relaxation rate for the Bragg diffraction efficiency on the RDS, which is observed after the application of an external electric field, increases with the intensity of a probe beam. This dependence is linear in the initial stage of relaxation caused by the screening of the external field because of the redistribution of charges over tilted conductive domain walls of the RDS. For the probe beam with an intensity of 49 mW/mm 2 , the induced effective conductivity of the RDS, which is estimated as σ eff = 3.5×10 −9 Ω −1 m −1 , is more than four orders of magnitude higher than the dark conductivity of the single-domain MgO:LiNbO 3 sample.
ISSN:0021-3640
1090-6487
DOI:10.1134/S0021364020220129