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计算模拟了在ps脉冲抽运周期结构GaAs晶体差频产生窄带THz波过程中，对于不同波长、不同脉宽的抽运光，周期结构GaAs晶体的走离长度和最佳周期长度的变化，并对计算结果进行了理论分析.研究了周期结构GaAs晶体的畴数对THz波光谱的影响.根据GaAs晶体温度色散公式，计算并分析了晶体最佳周期长度的温度调谐特性，研究了温度变化对THz波光谱的影响，提出了通过温度调谐实现在周期结构GaAs晶体中产生宽调谐、窄带宽THz波的新方法，该计算结果为下一步的实验研究提供了理论基础.
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关键词:
- ps脉冲 /
- 差频产生窄带THz波 /
- 周期结构GaAs晶体 /
- 温度调谐
In this paper, the tuning of walk-off length and the optimal period of periodical-inverted GaAs crystal in narrow-band terahertz-wave generation by difference frequency mixing was numerical simulated and analyzed in the condition of different wavelengths and durations of pump pulse.The influence of the number of domains of periodically-inverted GaAs crystal on the THz-wave spectrum was also studied.The temperature tuning properties in periodical-inverted GaAs crystal were calculated and analyzed with the temperature dependent Sellmeier function of GaAs crystal; the influence of temperature tuning on the THz-wave spectrum was also studied.The simulation showed a new way to generate the wide-tunable narrow-band THz wave with temperature tuning.These theoretical calculations served for the subsequent experiment as theoretical basis and reference.-
Keywords:
- ps pulse /
- difference-frequency-mixing (DFG) narrow-band THz wave /
- periodical-inverted GaAs crystal /
- temperature tuning
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[2] ［2］Siegel P H 2004 IEEE Transaction on Microwave Theory and Techniques 52 2438
[3] ［3］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 57 5662］
[4] ［4］Li E B, Liu J S, Sun B, Yao J Q 2009 Chin. Phys. B 18 2846
[5] ［5］Liu S G, Zhang K C 2007 Acta Phys. Sin. 56 5258 (in Chinese) ［刘盛纲、张开春 2007 56 5258］
[6] ［6］Pavlov S G, Hubers H W, Orlova E E, Zhukavin R K, Riemann H, Nakata H, Shastin V N 2003 Phys. Stat. Sol. (b) 235 126
[7] ［7］Lee Y S，Norris T B 2002 J. Opt. Soc. Am. B 19 2791
[8] ［8］Lee Y S, Meade T, Perlin V, Winful H, Norris T B 2000 Appl. Phys. Lett. 76 2505
[9] ［9］Vodopyanov K L 2006 Opt. Express 14 2263
[10] ］Imeshev G, Fermann M E, Vodopyanov K L, Fejer M M, Yu X, Harris J S, Bliss D, and Lynch C 2006 Opt. Express 14 4439
[11] ］Vodopyanov K L2008 Laser & Photon. Rev. 2 11
[12] ］Skauli T, Kuo P S, Vodopyanov K L, Pinguent T J, Levi O, Eyres L A, Harris J S， Fejer M M 2003 J. Appl. Phys. 94 6447
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[1] ［1］Nahata A, Weling A S, Heinz T F 1996 App. l Phys. Lett. 69 2321
[2] ［2］Siegel P H 2004 IEEE Transaction on Microwave Theory and Techniques 52 2438
[3] ［3］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 57 5662］
[4] ［4］Li E B, Liu J S, Sun B, Yao J Q 2009 Chin. Phys. B 18 2846
[5] ［5］Liu S G, Zhang K C 2007 Acta Phys. Sin. 56 5258 (in Chinese) ［刘盛纲、张开春 2007 56 5258］
[6] ［6］Pavlov S G, Hubers H W, Orlova E E, Zhukavin R K, Riemann H, Nakata H, Shastin V N 2003 Phys. Stat. Sol. (b) 235 126
[7] ［7］Lee Y S，Norris T B 2002 J. Opt. Soc. Am. B 19 2791
[8] ［8］Lee Y S, Meade T, Perlin V, Winful H, Norris T B 2000 Appl. Phys. Lett. 76 2505
[9] ［9］Vodopyanov K L 2006 Opt. Express 14 2263
[10] ］Imeshev G, Fermann M E, Vodopyanov K L, Fejer M M, Yu X, Harris J S, Bliss D, and Lynch C 2006 Opt. Express 14 4439
[11] ］Vodopyanov K L2008 Laser & Photon. Rev. 2 11
[12] ］Skauli T, Kuo P S, Vodopyanov K L, Pinguent T J, Levi O, Eyres L A, Harris J S， Fejer M M 2003 J. Appl. Phys. 94 6447
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