Abstract The possibility of an electron beam exciting surface plasmons in conducting metal is discussed in this paper. A planar perfect-structure with subwavelength holes is proposed. The phenomenon that mimicking surface plasmon waves can be excited and amplified by an electron beam is proved theoretically and numerically. The mechanism of transmission through a subwavelength hole array is exploited to enhance the interaction between the electron beam and the mimicking surface plasmons.
Received: 07 December 2008
Revised: 08 January 2009
Accepted manuscript online:
PACS:
73.20.Mf
(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
(Interactions of particles and radiation with matter)
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 10676110) and the
National Fundamental Research Program of China (Grant No
2007CB310401).
Cite this article:
Hu Min(胡旻), Zhang Ya-Xin(张雅鑫), Yan Yang(鄢扬), Zhong Ren-Bin(钟任斌), and Liu Sheng-Gang(刘盛纲) Terahertz radiation from interaction between an electron beam and a planar surface plasmon structure 2009 Chin. Phys. B 18 3877
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