| 高斯波包在截止波导中的传播 |
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| 引用本文： | 陈安和,熊彩东.高斯波包在截止波导中的传播[J].电子科技大学学报（自然科学版）,2005,34(6):774-777. |
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| 作者姓名： | 陈安和 熊彩东 |
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| 作者单位： | 电子科技大学物理电子学院,成都,610054;电子科技大学物理电子学院,成都,610054 |
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| 摘 要： | 分析了电磁波传播时的超光速群速。对高斯波包在分段填充不同介质的波导中的传播情况进行了数值模拟,得到高斯波包通过截止区的群速和能速,并对其中涉及到的"超光速"问题作了一定的分析。通过模拟得出,在一定的截止区长度范围内和一定工作频率范围内,群速超过光速;并得到,波包的能量传播速度(能速)始终不会超过光速。
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| 关 键 词： | 异常传播 数值模拟 群速 能速 |
| 收稿时间： | 2004-03-03 |
| 修稿时间： | 2004-03-03 |
Anomalous Propagation of Gaussian Wave Packet Through the Cut-Off Waveguide |
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| CHEN An-he,XIONG Cai-dong.Anomalous Propagation of Gaussian Wave Packet Through the Cut-Off Waveguide[J].Journal of University of Electronic Science and Technology of China,2005,34(6):774-777. |
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| Authors: | CHEN An-he XIONG Cai-dong |
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| Affiliation: | 1.School of Physics Electronics,UEST of China Chengdu 610054 |
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| Abstract: | A simple analysis is made of the superluminal group velocity. The anomalous propagation of an electromagnetic Gaussian pulse through a waveguide with piecewise different dielectric constants is simulated. At the same time, the group velocity and energy velocity of Gaussian wave packet through cutoff region are calculated. And, the "superluminal" problem is analyzed involved in it. From the result of simulating, it is gained that when the length of cutoff region and the work frequency are in one range, group velocity is greater than the light speed in vacuum. But energy velocity is smaller than the light speed in vacuum all long. |
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| Keywords: | anomalous propagation numerical simulation group velocity energy velocity |
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