A hybrid wedge-to-wedge plasmonic waveguide with low loss propagation and ultra-deep-nanoscale mode confinement

Ma, Youqiao, Farrell, Gerald, Semenova, Yuliya and Wu, Qiang (2015) A hybrid wedge-to-wedge plasmonic waveguide with low loss propagation and ultra-deep-nanoscale mode confinement. Journal of Lightwave Technology, 33 (18). pp. 3827-3835. ISSN 0733-8724

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Official URL: http://dx.doi.org/10.1109/JLT.2015.2445571

Abstract

The well-known tradeoff between the propagation loss and mode confinement is a critical consideration for the plasmonic waveguide structures. Aiming to overcome this limitation, in this paper, we propose a compact plasmonic waveguide consisting of two identical dielectric wedge waveguides symmetrically placed on each side of a nanowedge-patterned thin metal film. The systematical analysis has demonstrated that the light can be confined to approximate 3000th of the diffraction spot size (ranging from lambda(2)/10 604 to lambda(2)/972) without sacrificing the propagation length (ranging from 1680 to 4724 mu m). Compared to the recent published structure which achieved the best tradeoff, to the best of our knowledge, the proposed waveguide could achieve a 9-fold enhanced mode confinement for the same propagation length and a 2.4-fold outspread propagation length for the same mode confinement.

Item Type: Article
Uncontrolled Keywords: Nanophotonics waveguide, nano-wedge, surface plasmon polaritons
Subjects: H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Nicola King
Date Deposited: 17 Sep 2015 15:02
Last Modified: 24 Oct 2017 08:52
URI: http://nrl.northumbria.ac.uk/id/eprint/23781

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