中国物理B ›› 2015, Vol. 24 ›› Issue (7): 77302-077302.doi: 10.1088/1674-1056/24/7/077302

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Coherent and tunable radiation with power enhancement from surface plasmon polaritons

龚森, 钟任斌, 胡旻, 陈晓行, 张平, 赵陶, 刘盛纲   

  1. Cooperative Innovation Centre of THz Science, University of Electronic Science and Technology of China, Chengdu 610054, China
  • 收稿日期:2014-11-07 修回日期:2015-01-26 出版日期:2015-07-05 发布日期:2015-07-05
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2014CB339801), the National Natural Science Foundation of China (Grant Nos. 61231005, 11305030, and 612111076), and the National High Technology Research and Development Program of China (Grant No. 2011AA010204).

Coherent and tunable radiation with power enhancement from surface plasmon polaritons

Gong Sen (龚森), Zhong Ren-Bin (钟任斌), Hu Min (胡旻), Chen Xiao-Xing (陈晓行), Zhang Ping (张平), Zhao Tao (赵陶), Liu Sheng-Gang (刘盛纲)   

  1. Cooperative Innovation Centre of THz Science, University of Electronic Science and Technology of China, Chengdu 610054, China
  • Received:2014-11-07 Revised:2015-01-26 Online:2015-07-05 Published:2015-07-05
  • Contact: Gong Sen E-mail:triwoods.uestc@163.com
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 2014CB339801), the National Natural Science Foundation of China (Grant Nos. 61231005, 11305030, and 612111076), and the National High Technology Research and Development Program of China (Grant No. 2011AA010204).

摘要: Surface plasmon polaritons excited by an electron beam can be transformed into coherent and tunable light radiation waves with power enhancement in the simple structure of a metal film with a dielectric medium loading. In this paper, the process of the radiation transformation of this radiation, and the dependencies of the radiation characteristics on the parameters of the structure and the electron beam are studied in detail. The radiation power enhancement is greatly influenced by the beam energy and the film thickness in the infrared to ultraviolet frequency region. Up to 122 times radiation power enhancement and 6.5% radiation frequency tuning band can be obtained by optimizing the beam energy and the parameters of the film.

关键词: surface plasmon polaritons, electron beam, radiation, power enhancement

Abstract: Surface plasmon polaritons excited by an electron beam can be transformed into coherent and tunable light radiation waves with power enhancement in the simple structure of a metal film with a dielectric medium loading. In this paper, the process of the radiation transformation of this radiation, and the dependencies of the radiation characteristics on the parameters of the structure and the electron beam are studied in detail. The radiation power enhancement is greatly influenced by the beam energy and the film thickness in the infrared to ultraviolet frequency region. Up to 122 times radiation power enhancement and 6.5% radiation frequency tuning band can be obtained by optimizing the beam energy and the parameters of the film.

Key words: surface plasmon polaritons, electron beam, radiation, power enhancement

中图分类号:  (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))

  • 73.20.Mf
41.60.Bq (Cherenkov radiation) 41.75.Fr (Electron and positron beams)