Shen Linfang, Wang Zhuoyuan, Deng Xiaohua, Wu Jin-Jei, Yang Tzong-Jer
Opt Lett. 2015 Apr 15;40(8):1853-6. doi: 10.1364/OL.40.001853.
Because the dispersion properties of surface magnetoplasmons (SMPs) in a magnetized plasmonic material closely depend on its cladding dielectric, it is possible to completely trap SMPs in a system consisting of a plasmonic material with cladding of a dielectric heterostructure. By using a semiconductor, our finite element simulation (performed using the software COMSOL) shows that terahertz one-way SMPs in such a system can be completely trapped at the interface of the heterostructure and hence, a focused subwavelength-scale hotspot with dramatically enhanced field is generated. Moreover, a one-way SMP pulse in this system can also be completely trapped, and the wave packet can be compressed into a stable hotspot on the subwavelength scale.
由于磁化等离子体材料中表面磁等离子体激元（SMPs）的色散特性与其包层电介质密切相关，因此在由具有介电异质结构包层的等离子体材料组成的系统中完全捕获SMPs是可能的。通过使用半导体，我们的有限元模拟（使用COMSOL软件进行）表明，这种系统中的太赫兹单向SMPs可以完全捕获在异质结构的界面处，因此会产生一个场显著增强的聚焦亚波长尺度热点。此外，该系统中的单向SMP脉冲也可以被完全捕获，并且波包可以被压缩成亚波长尺度上的稳定热点。
