Valley-Hall Topological Plasmons in a Graphene Nanohole Plasmonic Crystal Waveguide

We demonstrate that unidirectional and backscattering immune propagation of terahertz optical waves can be achieved in a topological valley-Hall waveguide made of graphene nanohole plasmonic crystals. In order to gain deeper physical insights into these phenomena, the band diagram of graphene nanoho...

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