Surface Polariton Cherenkov Light Radiation Source
Surface Polariton Cherenkov Light Radiation Source
复制标题
表面极化切伦科夫光辐射源
DOI：
10.1103/physrevlett.109.153902
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发表时间：
2012-10-10
影响因子：
8.6
通讯作者：
Hu, Min
中科院分区：
文献类型：
--
作者：
Liu, Shenggang;Zhang, Ping;Hu, Min
发现了一种物理现象：在具有介质加载的纳米金属薄膜结构中，由匀速运动的电子束激发的表面极化子可以转化为介质中强度增强的切伦科夫辐射。在此基础上，提出了表面极化切伦科夫光源，并对其进行了探索。结果表明，表面极化切伦科夫光源可以产生从可见光到紫外光的辐射，辐射功率密度可以达到甚至超过10(8)W/cm(2)，具体取决于束流能量和电流密度。它是一种可调谐的微型光源，有望集成到芯片上，并内置到光源阵列中。
A physical phenomenon has been found: in a structure of nanometal film with dielectric-medium loading, the surface polaritons excited by a uniformly moving electron bunch can be transformed into Cherenkov radiation with intensity enhancement in the medium. Based on this mechanism, the surface polariton Cherenkov light radiation source is presented and explored in the Letter. The results show that surface polariton Cherenkov light radiation source can generate radiation, from visible light to the ultraviolet frequency regime and the radiation power density can reach or even exceed 10(8) W/cm(2) depending on the beam energy and current density. It is a tunable and miniature light radiation source promising to be integrated on a chip and built into a light radiation source array.