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.
参考文献
| [1] | Huang Zhixun.Faster-than-light (superluminal) experimental researches in last decade[J].Journal of Beijing institute of Petro-Chemical Technology(北京石油化工学院学报),2002,10(4):20 (in Chinese). |
| [2] | Chu S,Wong S.Linear pulse propagation in an absorbing medium[J].Phy-Rev.Left.,l982,48(11):738-741. |
| [3] | Steinberg A M,Kwiat P G,Chiao R Y.Measurement of the single-photon tunneling time[J].Phy.Rev.Left.,1993,71(5):708-711. |
| [4] | Endera A,Nimtz G.Photonic-tunneling experiments[J].Phy.Rev.B,1993,47(15):9605-9609. |
| [5] | Hache A,Poirier L.Long-range superluminal pulse propagation in a coaxial photonic[J].Appl.Phys.Left.,2002,80(3):518-520. |
| [6] | Munday J N,Robert W M.Negative group velocity pulse tunneling through a coaxial photonic crystal[J].Appl.Phys.Left.,2002,81(11):2127-2129. |
| [7] | Ou Xiaojuan,Zhou Wei,et al.Negative and superluminal group velocity propagation with narrow pulse in a coaxial photonic crystal[J].Chin.Phys.Left.,2007,24(3):624. |
| [8] | Ou Xiaojuan,Zhou Wei,et al.Experiment of superluminal group velocity in the electronics field[J].Acta Photonica Sinica(光子学报),2007,5:(in Chinese). |
| [9] | Wang L J.On a few problems related to the velocities of light[J].Journal of Beijing institute of Petro-Chemical Technology(北京石油化工学院学报),2002,10(4):6-19(in Chinese). |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%