Terahertz optical parameters and lattice vibration-induced resonance of Er3+-doped Y3Al5O12 crystal

被引：12

作者：

Fu, Xiaojian ^{[1
]}

Guo, Yunsheng ^{[1
]}

Zhou, Ji ^{[1
]}

机构：

[1] Tsinghua Univ, State Key Lab New Ceram & Fine Proc, Sch Mat Sci & Engn, Beijing 100084, Peoples R China

来源：

JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS | 2013年 / 27卷 / 14期

基金：

美国国家科学基金会; 国家高技术研究发展计划(863计划);

关键词：

TEMPERATURE-GROWN GAAS; TIME-DOMAIN SPECTROSCOPY; YTTRIUM-ALUMINUM-GARNET; RADIATION; THZ; ABSORPTION; CONSTANTS; BAND;

D O I：

10.1080/09205071.2013.823569

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper, the terahertz time-domain spectra of undoped and Er3+-doped YAG crystals with the components of Y3Al5O12, (Er0.2Y0.8)(3)Al5O12, and (Er0.5Y0.5)(3)Al5O12 were detected and the corresponding frequency-domain spectra were also obtained after Fourier transform. It is shown that the three kinds of crystals are weakly dispersive and nearly transparent below 2.10THz, whereas in the frequency region between 2.10 and 2.60THz, dielectric resonance and obvious absorption are investigated which can be attributed to the low-frequency lattice phonon. It is also found that with the increase in Er3+ concentration, the resonant frequency exhibits a red shift and the values of refractive index show a small increase, which could be explained by the larger ionic mass and larger polarizability of Er3+ compared to Y3+, respectively. This work contributes to the research on YAG laser materials as well as novel materials applicable to THz devices.

引用

页码：1792 / 1799

页数：8

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