Terahertz optical constants of ytterbium-doped yttrium aluminum garnet crystals
Terahertz optical constants of ytterbium-doped yttrium aluminum garnet crystals
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DOI：
10.1063/1.2195891
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发表时间：
2006-05
影响因子：
3.2
通讯作者：
T. Tsai;Chih-Fu Chang;Shi-Jie Chen;M. Tani;M. Yamaguchi;H. Sumikura;H. Chiang;Yuan-Fan Chen;W. Tse
中科院分区：
文献类型：
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作者：
T. Tsai;Chih-Fu Chang;Shi-Jie Chen;M. Tani;M. Yamaguchi;H. Sumikura;H. Chiang;Yuan-Fan Chen;W. Tse
采用太赫兹时域光谱技术测量了掺镱钇铝石榴石（YbxY 1 −x）3Al 5 O 12（Yb：YAG）晶体在0.2 ~ 1.8THz频率范围内的光学常数，标称x值分别为0.0、0.1、0.2、0.5、0.8和1.0。Yb：YAG晶体的真实的折射率随Yb ~（3+）浓度线性增加。实验结果可用Sellmeier方程拟合。结果表明，Yb：YAG晶体中Yb取代Y后，声子模向低频移动。Yb：YAG晶体的消光系数小于0.05。
Terahertz time-domain spectroscopy has been employed to measure the optical constants of ytterbium-doped yttrium aluminum garnet (YbxY1−x)3Al5O12 (Yb:YAG) crystals for nominal x values of 0.0, 0.1, 0.2, 0.5, 0.8, and 1.0 in the frequency range from 0.2to1.8THz. The real refractive indices for Yb:YAG crystals increase linearly with the concentration of Yb3+. The experimental results can be fitted by the Sellmeier equation. The results imply that the phonon modes of the Yb:YAG crystals shift to lower frequencies with substitution of Yb for Y. The extinction coefficients of the Yb:YAG crystals are smaller than 0.05.