Complete spectral gap in coupled dielectric waveguides embedded into metal

Abstract

We study a plasmonic coupler involving backward (TM_01) and forward (HE_11) modes of dielectric waveguides embedded into infinite metal. The simultaneously achievable contradirectional energy flows and codirectional wavevectors in different channels lead to a spectral gap, despite the absence of periodic structures along the waveguide. We demonstrate that a complete spectral gap can be achieved in a symmetric structure composed of four coupled waveguides.

3 pages, 4 figures

References in corpus (1)

• Optical Bistability in Nonlinear Optical Coupler with Negative Index Channel

Cited by in corpus (1)

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