Backward and forward modes guided by metal-dielectric-metal plasmonic waveguides

Artur R. Davoyan; Ilya V. Shadrivov; Sergey I. Bozhevolnyi; Yuri S. Kivshar

doi:10.1117/1.3437397

Backward and forward modes guided by metal-dielectric-metal plasmonic waveguides

Artur R. Davoyan^*, Ilya V. Shadrivov, Sergey I. Bozhevolnyi, Yuri S. Kivshar

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

42 Citations (Scopus)

Abstract

We revisited the problem of the existence of plasmonic modes guided by metal-dielectric-metal slot waveguides. For the case of lossless slot waveguides, we classify the guided modes in the structure with the metal dispersion and found that, in a certain parameter range, three different guided modes coexist at a fixed frequency, two (symmetric and antisymmetric) forward propagating modes and the third, backward propagating antisymmetric mode. We study the properties of the forward and backward plasmonic guided modes in the presence of realistic losses, and discuss the importance of evanescent modes in lossy structures.

Original language	English
Article number	043509
Journal	Journal of Nanophotonics
Volume	4
Issue number	1
DOIs	https://doi.org/10.1117/1.3437397
Publication status	Published - 2010

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abstract = "We revisited the problem of the existence of plasmonic modes guided by metal-dielectric-metal slot waveguides. For the case of lossless slot waveguides, we classify the guided modes in the structure with the metal dispersion and found that, in a certain parameter range, three different guided modes coexist at a fixed frequency, two (symmetric and antisymmetric) forward propagating modes and the third, backward propagating antisymmetric mode. We study the properties of the forward and backward plasmonic guided modes in the presence of realistic losses, and discuss the importance of evanescent modes in lossy structures.",

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AU - Davoyan, Artur R.

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AU - Bozhevolnyi, Sergey I.

AU - Kivshar, Yuri S.

PY - 2010

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AB - We revisited the problem of the existence of plasmonic modes guided by metal-dielectric-metal slot waveguides. For the case of lossless slot waveguides, we classify the guided modes in the structure with the metal dispersion and found that, in a certain parameter range, three different guided modes coexist at a fixed frequency, two (symmetric and antisymmetric) forward propagating modes and the third, backward propagating antisymmetric mode. We study the properties of the forward and backward plasmonic guided modes in the presence of realistic losses, and discuss the importance of evanescent modes in lossy structures.

KW - guided waves

KW - losses

KW - surface plasmons

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Backward and forward modes guided by metal-dielectric-metal plasmonic waveguides

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