Abstract
Manipulating the isofrequency contours (IFCs) of a metamaterial provides a remarkable ability to control light propagation and emission. Here we see a topological transition from dielectric- to metallic-type hyperbolic dispersion, and a kind of metamaterial with conical or linear-crossing IFCs at the transition point. Negative refraction and propagation along fixed directions can be realized, even for incident waves with large wave-vector components, which can be utilized for applications including optical splitting and switching, and superresolution imaging with partial cloaking.
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