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Dispersion of the dielectric function real part for Mg:LiNbO3 crystals at terahertz frequencies
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Dispersion of the dielectric function real part for Mg:LiNbO3 crystals at terahertz frequencies

K.A. Kuznetsov, S.P. Kovalev, G.K. Kitaeva, T.D. Wang, Y.Y. Lin, Y.C. Huang, I.I. Naumova 和 A.N. Penin
Applied Physics B: Lasers and Optics, 卷.101(4), 頁碼.811-815
12/2010
DOI: https://doi.org/10.1007/s00340-010-4296-z

摘要

Physics and Astronomy (all) Physics and Astronomy (miscellaneous)
We study dispersion of the dielectric function real part ε′ in the terahertz-frequency range for bulk and periodically poled congruent LiNbO 3 and Mg:LiNbO 3 crystals. The concentration of Mg in Mg:LiNbO 3 samples was close to 5 mol%, which is the photorefractive threshold. Approximate expressions for extraordinary polariton dispersion dependence were obtained in the range 0.5-6.5 THz. The influence of Mg-dopant on the optical properties of crystals in the terahertz range is revealed. Changes of the defect structure of lithium niobate crystals are discussed. © 2010 Springer-Verlag.

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