Manifestation of the secondary structure of lithium niobate single crystals with low photorefractive effect was researched by Raman scattering and photoinduced light scattering (PILS). Laser induced static microdefects with changed refractive index were revealed. Shape and asymmetry of PILS patterns were demonstrated to depend on difference in refractive indexes and energies of ordinary and extraordinary beams. Nonmonotonicity of temperature dependence of Raman bands intensities was shown to be caused by gradual shutdown of photorefraction mechanisms at rise in the temperature that leads to decrease of laser radiation intensity. We have revealed an concentration area of high structure order in LiNbO₃:Zn crystals. Raman bands that probably correspond to А₂ symmetry scalar vibrations were detected in LiNbO₃ crystals strongly doped by Zn and Mg.

Date Published: 14 December 2016
PDF: 8 pages
Proc. SPIE 10176, Asia-Pacific Conference on Fundamental Problems of Opto- and Microelectronics, 101761Q (14 December 2016); doi: 10.1117/12.2268162

Published in SPIE Proceedings Vol. 10176:
Asia-Pacific Conference on Fundamental Problems of Opto- and Microelectronics
Yuri N. Kulchin; Roman V. Romashko; Alexander V. Syuy, Editor(s)