Инд. авторы:	Yelisseyev A., Krinitsin P.G., Isaenko L., Grazhdannikov S.A.
Заглавие:	Spectroscopic properties of nonlinear optical LiGaTe2 crystal
Библ. ссылка:	Yelisseyev A., Krinitsin P.G., Isaenko L., Grazhdannikov S.A. Spectroscopic properties of nonlinear optical LiGaTe2 crystal // Optical Materials. - 2015. - Vol.42. - P.276-280. - ISSN 0925-3467. - EISSN 1873-1252.
Идентиф-ры:	DOI: 10.1016/j.optmat.2014.12.046; SCOPUS: 2-s2.0-84924096157; WoS: 000351800300045;
Реферат:	eng: The nonlinear crystal LiGaTe2 (LGT) with chalcopyrite structure was grown by the Bridgman-Stockbarger technique. LGT is transparent in the 0.52-16 μm range. Fundamental absorption edge is due to direct allowed transitions; Band gap values are 2.65 and 2.41 eV at 80 and 300 K, respectively. Vibrational, Raman and IR absorption spectra demonstrate four groups of lines in the 50-350 cm-1. Intense orange photoluminescence (PL) in a broad 605 nm band, excited at band-to-band transitions and quenched in the 180-250 K range is related to self-trapped excitons. Weaker PL components at 510, 729 and 898 nm are associated supposedly with F-centers and their complexes. According to PL excitation spectra valence band is split into three components: Γ7(A), Γ6(B) and Γ7(C), from which electrons are excited to the bottom of the conduction band Γ6. The crystal field splitting (ΔCF) and the spin-orbit splitting (ΔSO) were determined to be -0.75, and 0.62 respectively, at liquid nitrogen temperature. © 2015 Elsevier B.V. All rights reserved.
Ключевые слова:	Bridgman-Stockbarger Techniques; Band-to-band transition; Luminescence; Raman scattering; Absorption; Color centers; Crystal structure; Energy gap; Excitons; Crystal-field splitting; Luminescence; Raman scattering; Fundamental absorption edge; Nonlinear optics; Spectroscopic property; Liquid nitrogen temperature; LiGaTe2; LiGaTe2; Growth; Absorption; Growth (materials); Chalcopyrite structures;
Издано:	2015
Физ. хар-ка:	с.276-280