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Appl. Sci. 2018, 8(1), 144; https://doi.org/10.3390/app8010144

Manipulating Propagation Constants of Silver Nanowire Plasmonic Waveguide Modes Using a Dielectric Multilayer Substrate

1
Department of Optics and Optical Engineering, Institute of Photonics, University of Science and Technology of China, Hefei 230026, Anhui, China
2
School of Science, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
3
Center for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology, University of Maryland, School of Medicine, Baltimore, MD 21201, USA
This authors contribute equally to this work.
*
Author to whom correspondence should be addressed.
Received: 19 December 2017 / Accepted: 19 December 2017 / Published: 22 January 2018
(This article belongs to the Special Issue Surface Waves on Planar Photonic Crystals)
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Abstract

Experiments and numerical simulations demonstrate that when a silver nanowire is placed on a dielectric multilayer, but not the commonly used bare glass slide, the effective refractive index of the propagating surface plasmons along the silver nanowire can be controlled. Furthermore, by increasing the thickness of the top dielectric layer, longer wavelength light can also propagate along a very thin silver nanowire. In the experiment, the diameter of the silver nanowire could be as thin as 70 nm, with the incident wavelength as long as 640 nm. The principle of this control is analysed from the existence of a photonic band gap and the Bloch surface wave with this dielectric multilayer substrate. View Full-Text
Keywords: silver nanowire; surface plasmon polariton waveguide; dielectric multilayer; Bloch surface wave; photonic band gap silver nanowire; surface plasmon polariton waveguide; dielectric multilayer; Bloch surface wave; photonic band gap
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Xiang, Y.; Chen, J.; Zhang, D.; Wang, R.; Kuai, Y.; Lu, F.; Tang, X.; Wang, P.; Ming, H.; Rosenfeld, M.; Badugu, R.; Lakowicz, J.R. Manipulating Propagation Constants of Silver Nanowire Plasmonic Waveguide Modes Using a Dielectric Multilayer Substrate. Appl. Sci. 2018, 8, 144.

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