The effect of an optical pump on the absorption coefficient of magnesium-doped near-stoichiometric lithium niobate in terahertz range

doi:10.1088/1674-1056/22/10/107802

中国物理B ›› 2013, Vol. 22 ›› Issue (10): 107802-107802.doi: 10.1088/1674-1056/22/10/107802

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

The effect of an optical pump on the absorption coefficient of magnesium-doped near-stoichiometric lithium niobate in terahertz range

左志高^{a b}, 凌福日^b, 马德才^c, 吴亮^d, 刘劲松^a, 姚建铨^{a d}

a Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China;
b School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China;
c Sino-French Institute of Nuclear Engineering & Technology, Sun Yat-Sen University, Guangzhou 510275, China;
d College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China

收稿日期:2013-03-08 修回日期:2013-04-02 出版日期:2013-08-30 发布日期:2013-08-30
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10974063, 61205096, and 61177095), the Natural Science Foundation of Hubei Province, China (Grant Nos. 02-16-230008, 2010CDA001, and 2012FFA074), the Research Foundation of Huazhong University of Science and Technology, China (Grant No. 01-09-230904), the Ph. D. Program Foundation of Ministry of Education of China (Grant No. 20100142110042), and the Fundamental Research Funds for the Central Universities, China (Grant Nos. 2010MS041 and 2011TS001).

The effect of an optical pump on the absorption coefficient of magnesium-doped near-stoichiometric lithium niobate in terahertz range

Zuo Zhi-Gao (左志高)^{a b}, Ling Fu-Ri (凌福日)^b, Ma De-Cai (马德才)^c, Wu Liang (吴亮)^d, Liu Jin-Song (刘劲松)^a, Yao Jian-Quan (姚建铨)^{a d}

a Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China;
b School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China;
c Sino-French Institute of Nuclear Engineering & Technology, Sun Yat-Sen University, Guangzhou 510275, China;
d College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China

Received:2013-03-08 Revised:2013-04-02 Online:2013-08-30 Published:2013-08-30
Contact: Ling Fu-Ri E-mail:lingfuri@163.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10974063, 61205096, and 61177095), the Natural Science Foundation of Hubei Province, China (Grant Nos. 02-16-230008, 2010CDA001, and 2012FFA074), the Research Foundation of Huazhong University of Science and Technology, China (Grant No. 01-09-230904), the Ph. D. Program Foundation of Ministry of Education of China (Grant No. 20100142110042), and the Fundamental Research Funds for the Central Universities, China (Grant Nos. 2010MS041 and 2011TS001).

摘要/Abstract

摘要： The absorption coefficient of magnesium-doped near-stoichiometric lithium niobate crystal is measured by terahertz time-domain spectroscopy in a frequency range of 0.2 THz-0.9 THz at room temperature. The absorption coefficient is modulated by external optical pump fields. Experimental results show that the absorption coefficient of near-SLN:Mg crystal is approximately in a range of 22 cm^-1-35 cm^-1 in a frequency range of 0.2 THz-0.9 THz and tunable up to nearly 15%. Further theoretical analysis reveals that the variation of absorption coefficient is related to the number of light-induced carriers, domain reversal process, and OH^- absorption in this crystal.

关键词: near-stoichiometric LiNbO₃：Mg, terahertz, absorption coefficient, domain reversal

Abstract: The absorption coefficient of magnesium-doped near-stoichiometric lithium niobate crystal is measured by terahertz time-domain spectroscopy in a frequency range of 0.2 THz-0.9 THz at room temperature. The absorption coefficient is modulated by external optical pump fields. Experimental results show that the absorption coefficient of near-SLN:Mg crystal is approximately in a range of 22 cm^-1-35 cm^-1 in a frequency range of 0.2 THz-0.9 THz and tunable up to nearly 15%. Further theoretical analysis reveals that the variation of absorption coefficient is related to the number of light-induced carriers, domain reversal process, and OH^- absorption in this crystal.

Key words: near-stoichiometric LiNbO₃：Mg, terahertz, absorption coefficient, domain reversal

中图分类号: (Photorefractive effects)

78.20.Mg

42.70.Mp (Nonlinear optical crystals)

左志高, 凌福日, 马德才, 吴亮, 刘劲松, 姚建铨. The effect of an optical pump on the absorption coefficient of magnesium-doped near-stoichiometric lithium niobate in terahertz range[J]. 中国物理B, 2013, 22(10): 107802-107802.

Zuo Zhi-Gao (左志高), Ling Fu-Ri (凌福日), Ma De-Cai (马德才), Wu Liang (吴亮), Liu Jin-Song (刘劲松), Yao Jian-Quan (姚建铨). The effect of an optical pump on the absorption coefficient of magnesium-doped near-stoichiometric lithium niobate in terahertz range[J]. Chin. Phys. B, 2013, 22(10): 107802-107802.

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The effect of an optical pump on the absorption coefficient of magnesium-doped near-stoichiometric lithium niobate in terahertz range

The effect of an optical pump on the absorption coefficient of magnesium-doped near-stoichiometric lithium niobate in terahertz range

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