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Title: Localized spoof surface plasmons in textured open metal surfaces
Authors: Gao, Zhen
Gao, Fei
Xu, Hongyi
Zhang, Youming
Zhang, Baile
Keywords: Plasmonics
Issue Date: 2016
Source: Gao, Z., Gao, F., Xu, H., Zhang, Y., & Zhang, B. (2016). Localized spoof surface plasmons in textured open metal surfaces. Optics Letters, 41(10), 2181-2184.
Series/Report no.: Optics Letters
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.
ISSN: 0146-9592
DOI: 10.1364/OL.41.002181
Schools: School of Physical and Mathematical Sciences 
Rights: © 2016 Optical Society of America (OSA).
Fulltext Permission: none
Fulltext Availability: No Fulltext
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