期刊
PHYSICAL REVIEW B
卷 84, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.84.113409
关键词
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资金
- Australian Research Council [DP110100713]
- US National Science Foundation [ECCS-0801772]
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [0801772] Funding Source: National Science Foundation
We derive an exact dispersion relation for the surface plasmon polaritons of a nonlinear plasmonic waveguide using exact field decomposition of TM waves. Our approach generalizes the known linear dispersion relations to the case of a medium nonlinearity of the form epsilon(NL) = epsilon(L) + alpha vertical bar E vertical bar(2n). We apply the unique dispersion relation to a plasmonic waveguide with a Kerr-type nonlinearity (n = 1) and show that it enables backward-propagating modes. It also introduces critical points in the energy spectrum of surface plasmon polaritons that result in enhanced interaction of nonlinear modes with each other and external electromagnetic fields.
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