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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) |
Cooperative Innovation Centre of THz Science, University of Electronic Science and Technology of China, Chengdu 610054, China |
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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.
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Received: 07 November 2014
Revised: 26 January 2015
Accepted manuscript online:
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PACS:
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73.20.Mf
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(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
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41.60.Bq
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(Cherenkov radiation)
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41.75.Fr
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(Electron and positron beams)
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Fund: 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). |
Corresponding Authors:
Gong Sen
E-mail: triwoods.uestc@163.com
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Cite this article:
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) Coherent and tunable radiation with power enhancement from surface plasmon polaritons 2015 Chin. Phys. B 24 077302
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