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Phys Rev Lett. 2016 Feb 12;116(6):066804. doi: 10.1103/PhysRevLett.116.066804. Epub 2016 Feb 10.

Anisotropic 2D Materials for Tunable Hyperbolic Plasmonics.

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Department of Electrical Engineering & Computer Science, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, USA.
Department of Electrical & Computer Engineering, University of Minnesota, Minneapolis, Minnesota 55455, USA.


Motivated by the recent emergence of a new class of anisotropic 2D materials, we examine their electromagnetic modes and demonstrate that a broad class of the materials can host highly directional hyperbolic plasmons. Their propagation direction can be manipulated on the spot by gate doping, enabling hyperbolic beam reflection, refraction, and bending. The realization of these natural 2D hyperbolic media opens up a new avenue in dynamic control of hyperbolic plasmons not possible in the 3D version.

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