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Photorefractive properties and optical uniformity of crystals LiNbO3 (6,0 wt. % K2O)

N.A. Teplyakova, N.V. Sidorov, M N. Palatnikov

Tananaev Institute of Chemistry Subdivision of the Federal Research Centre «Kola Science Centre of the Russian Academy of Sciences», Apatity, Russia

DOI: 10.26456/pcascnn/2019.11.241

Abstract: Comparative researches were carried out for lithium niobate crystals with congruent and stoichiometric composition with a different genesis. It was shown that it is possible to obtain LiNbO3 crystals close in composition to stoichiometric, grown from a congruent melt with the addition of a 6.0 wt.% K2O flux. Such crystals are far superior to optical uniformity and photoelectric parameters of congruent crystals.

Keywords: single crystal, lithium niobate, photoelectric field, band gap, IR absorption spectrum, stretching vibrations of OH-groups.

Bibliography link:

Teplyakova, N.A. Photorefractive properties and optical uniformity of crystals LiNbO3 (6,0 wt. % K2O) / N.A. Teplyakova, N.V. Sidorov, M N. Palatnikov // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials: Interuniversity collection of proceedings / Ed. by V.M. Samsonov, N.Yu. Sdobnyakov. – Tver: TSU, 2019. – I. 11. – P. 241-248.

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