Complete spectral gap in coupled dielectric waveguides embedded into metal
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.
|Collections||ANU Research Publications|
|Source:||Applied Physics Letters|
|01_Liu_Complete_spectral_gap_in_2010.pdf||1.05 MB||Adobe PDF|
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