Graphene surface-polariton in-plane Cherenkov radiation
Graphene surface-polariton in-plane Cherenkov radiation
复制标题
DOI：
10.1016/j.carbon.2018.03.027
复制
发表时间：
2018-07
期刊：
影响因子：
10.9
通讯作者：
Jin Tao;Lin Wu;Guoxing Zheng
中科院分区：
文献类型：
--
作者：
Jin Tao;Lin Wu;Guoxing Zheng
从理论上证明了平行石墨烯平面中的切伦科夫等离子体辐射。结果表明，石墨烯切伦科夫辐射可以被相对较低速度的运动电子激发，这大大降低了由于石墨烯等离子体的低相速度和高场约束而导致的切伦科夫辐射实现的难度.激发的石墨烯等离子体激元波长和切伦科夫辐射角可以通过改变费米能级来动态地改变，这为有源集成光子应用中的等离子体激元切伦科夫效应提供了通用的、可调谐的机制。
The Cherenkov plasmonic radiation in/parallel graphene plane is demonstrated theoretically. It is shown that the graphene Cherenkov radiation can be excited by a moving electron at a relative lower speed, which greatly reduces the difficulty for the Cherenkov radiation realization due to the low phase velocity and high field confinement of graphene plasmons. The excited graphene plasmons wavelength and the Cherenkov radiation angle can be dynamically changed by varying the Femi energy levels, which provides a versatile, tunable mechanism for plasmonic Cherenkov effect in active integrated photonic applications.