Photorefractive properties of congruent lithium niobate crystals doped with zinc
- Authors: Sidorov N.V.1, Palatnikov M.N.1, Teplyakova N.A.1, Gabain A.A.1, Efremov I.N.1
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Affiliations:
- Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center
- Issue: Vol 7, No 2 (2016)
- Pages: 170-176
- Section: Materials of Electronic
- URL: https://journals.rcsi.science/2075-1133/article/view/204904
- DOI: https://doi.org/10.1134/S2075113316020209
- ID: 204904
Cite item
Abstract
Optical and structural homogeneity and photorefractive properties of LiNbO3:Zn crystals (0.03 to 4.5 mol % Zn) were investigated by the methods of laser conoscopy, photoinduced light scattering, and Raman spectroscopy. It is established that the photorefractive effect nonmonotonically depends on the concentration of Zn2+ and is almost absent in LiNbO3:Zn crystals containing 0.05 and 4.5 mol % Zn. The suppression of photorefraction is explained by a decrease in the number of defects with the electrons localized on them due to the replacement of the NbLi and VLi defects by Zn2+ cations, by the appearance of shallow traps near the bottom of the conduction zone, and by the radiative recombination of laser-induced photo-electrons. The conoscopic pattern of a single-axis crystal of high optical quality was observed in a LiNbO3:Zn crystal containing 4.5 mol % Zn upon irradiation by the laser with a power of 90 mW. This pattern is of much better quality than the one observed with a laser radiation power of 1 mW, which is explained by curing of the defects by the laser radiation. An area of highly ordered structure with high alternation ordering of main and doped cations and vacancies along the polar axis in the cation sublattice is detected.
About the authors
N. V. Sidorov
Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center
Author for correspondence.
Email: sidorov@chemy.kolasc.net.ru
Russian Federation, Akademgorodok 26a, Apatity, Murmansk oblast, 184209
M. N. Palatnikov
Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center
Email: sidorov@chemy.kolasc.net.ru
Russian Federation, Akademgorodok 26a, Apatity, Murmansk oblast, 184209
N. A. Teplyakova
Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center
Email: sidorov@chemy.kolasc.net.ru
Russian Federation, Akademgorodok 26a, Apatity, Murmansk oblast, 184209
A. A. Gabain
Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center
Email: sidorov@chemy.kolasc.net.ru
Russian Federation, Akademgorodok 26a, Apatity, Murmansk oblast, 184209
I. N. Efremov
Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center
Email: sidorov@chemy.kolasc.net.ru
Russian Federation, Akademgorodok 26a, Apatity, Murmansk oblast, 184209