级联差频产生太赫兹辐射的理论研究

钟凯; 姚建铨; 徐德刚; 张会云; 王鹏

doi:10.7498/aps.60.034210

摘要

针对差频产生太赫兹(THz)辐射转换效率低的缺点,提出了级联差频的新机理以提高转换效率,并以ZnTe晶体为例,对级联差频产生THz辐射的原理和过程进行了理论研究.通过对级联差频耦合波方程组的求解,得出了ZnTe晶体中级联差频的最佳抽运条件和ZnTe晶体的最佳长度,并且分析了晶体吸收、波矢失配及抽运强度对级联差频的影响.计算结果表明,通过级联差频可以大大提高THz波的转换效率,其光子转换效率甚至可以超过Manley-Rowe关系的限制.

关键词:

太赫兹辐射 /
差频 /
级联 /
ZnTe晶体

Abstract

A novel mechanism of cascaded difference frequency generation (DFG) is advanced in this article to solve the problem of low-efficiency in terahertz (THz) DFG. The cascaded DFG process is theoretically analyzed using ZnTe crystal as an example. The optimal pumping condition and crystal length is obtained, and the effects of crystal absorption, wave number mis-match and pumping intensity are investigated by solving the coupling wave equations of cascaded DFG. It is obviously seen from the calculation results that the terahertz conversion efficiency can be greatly enhanced in cascaded DFG, in which the photon conversion efficiency can even break through the Manley-Rowe limit.

Keywords:

作者及机构信息

1.
天津大学精密仪器与光电子工程学院,激光与光电子研究所,天津 300072

基金项目: 国家重点基础研究发展计划(973)项目(批准号:2007CB310403)和国家自然科学基金(批准号:60801017和10874128)资助的课题.

Authors and contacts

1.
Institute of Laser and Optoelectronics, College of Precision Instrument and Optoelectronic Engineering, Tianjin University, Tianjin 300072, China

参考文献

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[25]	Skauli T, Kuo P S, Vodopyanov K L, Pinguet T J, Levi O, Eyres L A, Harris J S, Fejer M M, Gerard B, Becouarn L, Lallier E 2003 J Appl. Phys. 94 6447
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施引文献

[1]	Shikata J, Kawasa K, Karino K, Taniuchi T, Ito H 2000 IEEE Trans. Microwave Theory Tech. 48 653
[2]	Sun B, Liu J S, Ling F R, Wang K J, Zhu D Q, Yao J Q 2009 Acta Phys. Sin. 58 1745 (in Chinese) [孙博、刘劲松、凌福日、王可嘉、朱大庆、姚建铨 2009 物理学报 58 1745]
[3]	Sun B, Liu J S, Li E B, Yao J Q 2009 Chin. Phys. B 18 2846
[4]	Li Z Y,Yao J Q, Li J, Bing P B, Xu D G, Wang P 2010 Acta Phys. Sin. 59 6237 (in Chinese) [李忠洋、姚建铨、李俊、邴丕彬、徐德刚、王鹏 2010 物理学报 596237]
[5]	Kawase K, Mizuno M, Sohma, Takahashi H, Taniuchi T, Urata Y, Wada S, Tashiro H, Ito H 1999 Opt. Lett. 24 1065
[6]	Kawase K, Hatanaka T, Takahashi H, Nakamura K, Taniuchi T, Ito H 2000 Opt. Lett. 25 1714
[7]	Shi W, Ding Y J, Fernelius N, Vodopyanov K 2002 Opt. Lett. 27 1454
[8]	Shi W, Ding Y J 2003 Appl. Phys. Lett. 83 848
[9]	Sun B, Yao J Q, Wang Z, Wang P 2007 Acta Phys. Sin. 56 1390 (in Chinese) [孙博、姚建铨、王卓、王鹏 2007 物理学报 56 1390]
[10]	Liu H, Xu D G, Yao J Q 2008 Acta Phys. Sin. 57 5662 (in Chinese) [刘欢、徐德刚、姚建铨 2008 物理学报 57 5662]
[11]	Huang N, Li X F, Liu H J, Xia C P 2009 Acta Phys. Sin. 58 8326 (in Chinese) [黄楠、李雪峰、刘红军、夏彩鹏 2009 物理学报 58 8326]
[12]	Liu H, Xu D G, Yao J Q 2009 Chin Phy. B 18 1077
[13]	Wang Z, Wang Y Y, Yao J Q, Wang P 2010 Acta Phys. Sin. 59 3249 (in Chinese) [王卓、王与烨、姚建铨、王鹏 2010 物理学报 59 3249]
[14]	Zhong K, Yao J Q, Xu D G, Wang Z, Li Z Y, Zhang H Y, Wang P 2010 Opt. Commun. 283 3520
[15]	Tochitsky S Ya, Ralph J E, Sung C, Joshi 2005 J. Appl. Phys. 98 026101
[16]	Tochitsky S Ya, Sung C, Trubnick S E, Joshi C, Vodopyanov K L 2007 J. Opt. Soc. Am. B 24 2509
[17]	Ji J R, Feng Y 2008 Advanced Optics Textbook (Beijing: Science Press) p60 (in Chinese) [家镕、冯莹2008高等光学教程 (北京:科学出版社) 第60页]
[18]	Qian S X, Wang G M 2001 Nonlinear Optics (Shanghai: Fudan University Press) p87 (in Chinese) [钱士雄、王恭明 2001 非线性光学(上海:复旦大学出版社) 第87页]
[19]	Cronin-Golomb M 2004 Opt. Lett. 29 2046
[20]	Yuan T, Xu J Z, Zhang X C 2004 Infrared Phys. Techn. 45 417
[21]	Vodopyanov K L, Fejer M M, Yu X, Harris J S, Lee Y S, Hurlbut W C, Kozlov V G, Bliss D, Lynch C 2006 Appl. Phys. Lett. 89 141119
[22]	Lee Y S, Hurlbut W C, Vodopyanov K L, Fejer M M, Kozlov V G 2006 Appl. Phys. Lett. 89 181104
[23]	Trubnick S E, Tochitsky S Ya, Joshi C 2009 Opt. Express 17 2385
[24]	Schaar J E, Vodopyanov K L, Fejer M M 2007 Opt. Lett. 32 1284
[25]	Skauli T, Kuo P S, Vodopyanov K L, Pinguet T J, Levi O, Eyres L A, Harris J S, Fejer M M, Gerard B, Becouarn L, Lallier E 2003 J Appl. Phys. 94 6447
[26]	Vodopyanov K L 2008 Laser Photon. Rev. 2 11
[27]	Schaar J E, Vodopyanov K L, Kuo P S, Fejer M M, Yu X, Lin A, Harris J S, Bliss D, Lynch C, Kozlov V, Hurlbut W 2008 IEEE J. Sel. Top. Quantum Electron. 14 354

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