Tunable waveguide bends with graphene-based anisotropic metamaterials
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AbstractWe design tunable waveguide bends filled with graphene-based anisotropic metamaterials to achieve a nearly perfect bending effect. The anisotropic properties of the metamaterials can be described by the effective medium theory. The nearly perfect bending effect is demonstrated by finite element simulations of various structures with different bending curvatures and shapes. This effect is attributed to zero effective permittivity along the direction of propagation and matched effective impedance at the interfaces between the bending part and the dielectric waveguides. We envisage that the design will be applicable in the far-infrared and terahertz frequency ranges owing to the tunable dielectric responses of graphene.
CitationTunable waveguide bends with graphene-based anisotropic metamaterials 2016, 9 (2):025101 Applied Physics Express
SponsorsThe work described in this paper was supported by King Abdullah University of Science and Technology (KAUST), the National Science Foundation of China (NSFC) under contact No. 61225026, and the Program for Changjiang Scholars and Innovative Research Teams at the University under contract IRT13021.
PublisherJapan Society of Applied Physics
JournalApplied Physics Express