Nemilentsau Andrei, Low Tony, Hanson George
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.
Phys Rev Lett. 2016 Feb 12;116(6):066804. doi: 10.1103/PhysRevLett.116.066804. Epub 2016 Feb 10.
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.
受近期一类新型各向异性二维材料出现的启发，我们研究了它们的电磁模式，并证明这类材料中的很大一部分能够承载高度定向的双曲线型表面等离子体激元。其传播方向可通过栅极掺杂当场操控，从而实现双曲线型光束的反射、折射和弯曲。这些天然二维双曲线型介质的实现，为双曲线型表面等离子体激元的动态控制开辟了一条三维版本无法实现的新途径。
