Microwave surface waves supported by a tapered geometry metasurface

被引：6

作者：

Brock, Elizabeth M. G. ^{[1
]}

Hibbins, Alastair P. ^{[1
]}

机构：

[1] Univ Exeter, Dept Phys & Astron, Electromagnet & Acoust Mat Grp, Exeter EX4 4QL, Devon, England

来源：

APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

TRAPPED RAINBOW STORAGE; SLOW-LIGHT; EVANESCENT MODES; PLASMONS;

D O I：

10.1063/1.4820411

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Spatial dependent reduction of a surface wave's group velocity is demonstrated in the microwave regime across a metasurface comprised linear array of rectangular cavities. We manipulate the surface wave dispersion through variation in cavity width to provide a spatially dependent modal index. The mode is slowed and trapped at different positions along the metasurface. This "slow-light" phenomenon is observed via local electric-field and phase measurements. The latter is shown to provide a more accurate identification of the trapping location. We discuss the reflectivity of the mode close to this point and explore the excitation of higher order surface modes. (C) 2013 AIP Publishing LLC.

引用

页数：5

共 36 条

[1]

[Anonymous], ANSOFT HFSS

[2]

BARLOW HM, 1953, P I ELECTR ENG, V100, P329, DOI 10.1049/pi-3.1953.0068

[3] Surface plasmon subwavelength optics [J].