Surface plasmon wave propagation along single metal wire
Surface plasmon wave propagation along single metal wire
复制标题
DOI：
10.1088/1674-1056/21/11/117303
复制
发表时间：
2012-11
影响因子：
1.7
通讯作者：
R. Zhong;Weihao Liu;Jun Zhou;Shenggang Liu
中科院分区：
文献类型：
--
作者：
R. Zhong;Weihao Liu;Jun Zhou;Shenggang Liu
近年来，单根金属丝（SW）因其在太赫兹和更高频率范围内的潜在应用而备受关注。然而，作为最简单、最典型的表面等离子体激元（SPP）传输线，其研究似乎还远远不够。许多重要的传输行为还没有从物理学的观点得到满意的解释。本文利用基于索末菲理论的修正Drude模型（MDM），对表面等离子体沿着SW的传输行为进行了系统的理论研究。揭示了模式转换、辐射模寿命和共振频率等重要物理现象，并探讨了其机理。本文的结果将有助于对SPP传输特性和物理本质的一般理解，不仅对SW本身，而且对其他SPP传输线。
Recently, the single metal wire (SW) has become attractive for its potential applications in the terahertz and higher frequency range. However, as the most simple and typical surface plasmon polariton (SPP) transmission line, its study seems far from enough. Many important transmission behaviours have not been explained satisfactorily from the viewpoint of physics. In this paper, making use of the modified Drude model (MDM) based on the Sommerfeld theory, the transmission behaviours of SPPs along SW are systemically investigated theoretically. Some important physical phenomena such as the mode transformation, the lifetime of the radiative mode and the resonance frequency are revealed, and their mechanisms are explored. The results obtained in the paper will facilitate a general understanding of the features and the physical essence of the SPP transmission, not only for SW itself but also for other SPP transmission lines.