Quasi-Elastic Light Scattering in Congruent Lithium Niobate Crystals


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Raman scattering spectra in the frequency range of 5–75 cm–1 in lithium niobate samples with various structural imperfections were obtained. It is shown that the intensity of quasi-elastic light scattering on the wing of the Rayleigh line demonstrates an exponential dependence on the concentration of large-scale defects in the samples. Calibration curves for the intensity of quasi-elastic scattering dependence at low frequencies on the acoustic quality factor are constructed.

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A. Anikiev

Bauman Moscow State Technical University

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Email: aaanikyev@mail.ru
俄罗斯联邦, Moscow, 105005

M. Umarov

Vologda State University

Email: aaanikyev@mail.ru
俄罗斯联邦, Vologda, 160000

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