| 关于群速超光速特性的实验 |
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| 引用本文： | 滕李虎,周渭,冯宝英,偶晓娟,邹魏华. 关于群速超光速特性的实验[J]. 量子电子学报, 2008, 25(3): 287-291 |
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| 作者姓名： | 滕李虎 周渭 冯宝英 偶晓娟 邹魏华 |
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| 作者单位： | 西安电子科技大学仪器测量系,陕西西安,710071;西安电子科技大学仪器测量系,陕西西安,710071;西安电子科技大学仪器测量系,陕西西安,710071;西安电子科技大学仪器测量系,陕西西安,710071;西安电子科技大学仪器测量系,陕西西安,710071 |
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| 摘 要： | 实验探讨了在群速超光速的情况下信号传播速度的特点.正弦调幅信号通过失配的传输导线组时在特定的频率下能够出现群速超光速现象.验证了群速超光速在光子晶体中的速度随着导线的延长是起伏变化的,所获得的信号包络传输速度分别为1倍多光速到2倍多光速.当失配线足够长时(实验中为179.8m),甚至出现负群速.实验结果表明群速超光速与通常以光速传递情况的差异不但表现在大小方面,而且还表现在速度值的起伏方面.实验结果揭示了群速超光速传输速度特点与光和电的正常传输情况有明显的区别.
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| 关 键 词： | 量子光学 群速 群速超光速 色散介质 光子晶体 |
| 收稿时间： | 2007-05-25 |
Experiment on the characteristics of superluminal group velocity |
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| TENG Li-hu,ZHOU Wei,FENG Bao-ying,OU Xiao-juan,ZOU Wei-hua. Experiment on the characteristics of superluminal group velocity[J]. Chinese Journal of Quantum Electronics, 2008, 25(3): 287-291 |
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| Authors: | TENG Li-hu ZHOU Wei FENG Bao-ying OU Xiao-juan ZOU Wei-hua |
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| Affiliation: | TENG Li-hu ZHOU Wei FENG Bao-ying OU Xiao-juan ZOU Wei-hua Department of Measurement , Instrument,Xidian University,Xi'an 710071,China |
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| Abstract: | The characteristics of signal transmission speed in the condition of superluminal group velocity are discussed.When an amplitude modulated sinusoid signal is sent into mismatched transmission line groups at some special carrier frequencies,its group velocity of envelope is superluminal.The speed fluctuation according to the length changes of the line is verified.The group velocity of the signal envelope in the forbidden band is one to two times faster than the speed of light(c)in vacuum.Even negative group ... |
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| Keywords: | quantum optics group velocity superluminal group velocity dispersive medium coaxial pho-tonic |
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