Excitation of anti-symmetric coupled spoof SPPs in 3D SIS waveguides based on coupling

• 作者: 刘建龙 刘树田 周可雅 田莉莉 郭凯 陈杨 高扬
• 来源期刊: 中国物理B（英文版）
• 关键词: waveguides surface plasmons microwave technology
• 年，卷（期）: 2016,（7）
• 页码范围: 078401-1-078401-4
• 页数: 1页
• 语种: 英文
• DOI: 10.1088/1674-1056/25/7/078401

摘要

According to the electromagnetic field distributions, there exist two kinds of coupled spoof surface plasmon polaritons (SSPPs), the symmetric and anti-symmetric modes, in the three-dimensional (3D) subwavelength spoof–insulator–spoof (SIS) waveguide. We study the dispersion and excitation of the two kinds of coupled SSPPs supported by the 3D SIS waveguide. The evolution of the dispersion with the thickness and gap width of the waveguide is numerically investigated, and we give a theoretical analysis according to the coupling mechanism. Specially, based on the coupling mechanism, we design a zipper structure, through which the excitation and propagation of the anti-symmetric coupled modes can be realized effectively.