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arXiv · 1005.1111

Complete spectral gap in coupled dielectric waveguides embedded into metal

Wei Liu·Andrey Sukhorukov·Andrey Miroshnichenko·Chris Poulton·Zhiyong Xu·Dragomir Neshev·Yuri Kivshar
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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.

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Wei Liu, Andrey Sukhorukov, Andrey Miroshnichenko, Chris Poulton, Zhiyong Xu, Dragomir Neshev, Yuri Kivshar. 2010-05-07. Complete spectral gap in coupled dielectric waveguides embedded into metal. https://doi.org/10.1063/1.3458694

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