Localized spoof surface plasmons in textured open metal surfaces
Author
Gao, Zhen
Gao, Fei
Xu, Hongyi
Zhang, Youming
Zhang, Baile
Date of Issue
2016School
School of Physical and Mathematical Sciences
Abstract
We experimentally demonstrate that textured open metal surfaces, i.e., the ultrathin fan-shaped metallic strips, are able to support spoof localized surface plasmons (spoof-LSPs) in the microwave frequencies. Unlike conventional spoof-LSPs supported on textured closed metal surfaces, which originate from the interference of clockwise and counterclockwise propagating surface modes, spoof-LSPs on textured open metal surfaces arise from the Fabry–Perot-like resonances due to the terminations of the open surfaces. We show that both the number of modes and the resonance frequencies of spoof-LSPs on textured open metal surfaces can be engineered through tuning the grating numbers (or total length) of the structured fan-shaped metallic strip. This enables the tuning of the spoof-plasmonic resonator by simply changing its length, rather than the complete geometry, simplifying the design to just one degree of freedom. Experimental evidence of the spoof-LSP Fabry–Perot resonators in the microwave regimes is presented with near-field response spectra and mode profiles imaged directly.
Subject
Plasmonics
Metamaterials
Metamaterials
Type
Journal Article
Series/Journal Title
Optics Letters
Rights
© 2016 Optical Society of America (OSA).
Collections
http://dx.doi.org/10.1364/OL.41.002181
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