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

被引：0
作者：
K. A. Kuznetsov
S. P. Kovalev
G. K. Kitaeva
T. D. Wang
Y. Y. Lin
Y. C. Huang
I. I. Naumova
A. N. Penin
机构：
[1] M.V. Lomonosov Moscow State University,Department of Physics
[2] National Tsing Hua University,Institute of Photonics Technologies, Department of Electrical Engineering
来源：
Applied Physics B | 2010年 / 101卷
关键词：
Dielectric Function; Lithium Niobate; Lithium Niobate Crystal; Terahertz Frequency; Idle Wave;
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摘要：
We study dispersion of the dielectric function real part ε′ in the terahertz-frequency range for bulk and periodically poled congruent LiNbO3 and Mg:LiNbO3 crystals. The concentration of Mg in Mg:LiNbO3 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.
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页码：811 / 815
页数：4
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