中国物理B ›› 2008, Vol. 17 ›› Issue (6): 2257-2262.doi: 10.1088/1674-1056/17/6/053
Excitation of surface plasmons at the boundary of overdense plasma
王亮, 曹金祥, 王艳, 牛田野, 刘磊, 吕铀
- CAS Key Laboratory of Basic Plasma Physics and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
Excitation of surface plasmons at the boundary of overdense plasma
Wang Liang(王亮), Cao Jin-Xiang(曹金祥)†, Wang Yan(王艳), Niu Tian-Ye(牛田野), Liu Lei(刘磊), and Lü You(吕铀)
- CAS Key Laboratory of Basic Plasma Physics and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
摘要： The excitation of surface plasmons (SPs) with a strip grating at the boundary of an unmagnetized overdense plasma has been investigated theoretically and experimentally. An incident electromagnetic radiation was p-polarized at the frequency of 5GHz. Experiments showed that when the plasma density was four times higher than the critical density with the grating present, and the SPs could be excited at the boundary of the overdense plasma. Contribution of the glass layer in the formation of the SP dispersion relation was examined. When the incident electromagnetic radiation was coupled into SPs the coupling order with the effective permittivity was simulated qualitatively. We find that the existence of SPs at the boundary of overdense plasma indicates that the reflection coefficient of the incident electromagnetic radiation reaches its minimum and even becomes total absorption. In this work the plasma density was diagnosed by a Langmuir double probe.
中图分类号: (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
- 73.20.Mf