Coherent and tunable radiation with power enhancement from surface plasmon polaritons  

作　　者：龚森 钟任斌 胡旻 陈晓行 张平 赵陶 刘盛纲 

机构地区：[1]Cooperative Innovation Centre of THz Science,University of Electronic Science and Technology of China

出　　处：《Chinese Physics B》2015年第7期435-440,共6页中国物理B（英文版）

基　　金：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);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.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 

分 类 号：O53[理学—等离子体物理]