Effective Surface Plasmon Polaritons Induced by Modal Dispersion in a Waveguide

被引：63

作者：

Li, Zhuo ^{[1
,3
]}

Liu, Liangliang ^{[1
]}

Sun, Hengyi ^{[1
]}

Sun, Yunhe ^{[1
]}

Gu, Changqing ^{[1
]}

Chen, Xinlei ^{[1
]}

Liu, Yun ^{[1
]}

Luo, Yu ^{[2
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Elect & Informat Engn, Minist Educ, Key Lab Radar Imaging & Microwave Photon, Nanjing 211106, Jiangsu, Peoples R China

[2] Nanyang Technol Univ, Sch Elect & Elect Engn, Nanyang Ave, Singapore 639798, Singapore

[3] Southeast Univ, State Key Lab Millimeter Waves, Nanjing 210096, Jiangsu, Peoples R China

来源：

PHYSICAL REVIEW APPLIED | 2017年 / 7卷 / 04期

关键词：

RESONANCES; ARRAYS;

D O I：

10.1103/PhysRevApplied.7.044028

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We provide further theoretical insights and experimental verification of the modal-dispersion-induced effective surface-plasmon polaritons (ESPPs) by engineering the transverse-electric (TE)modes in conventional rectangular waveguides. The complete field distributions, dispersion relations, and asymptotic frequency of the ESPPs are derived analytically. Wave-port excitations and smooth bridges are designed for the mode conversion between propagating modes in rectangular waveguides and the ESPPs. Analytical calculations and numerical simulations are performed for TE10 -and TE20 -mode-induced ESPPs, showing excellent agreement. Moreover, we design a double-layered substrate-integrated waveguide showing that ESPPs are supported at the interface between the two layers with different dielectric constants. This work opens up an avenue for low-frequency designer surface plasmons and may find potential applications in the design of compact filters, resonators, and sensors of ESPPs in the microwave and terahertz frequencies.

引用

页数：9

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