Realization of Dirac Point with Double Cones in Optics

Abstract

The Dirac point with a double-cone structure for optical fields, an optical analogy Dirac fermions in graphene, can be realized in optically homogenous metamaterials. The condition for the realization of Dirac point in optical systems is the varying of refractive index from negative to zero and then to positive. Our analytical and numerical analysis have verified that, similar to electrons in graphene, the light field near the Dirac point possesses of the pseudodiffusive property, obeying the 1/L scaling law, where L is the propagating distance of light inside the media.

10 pages, 6 figures

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• Ballistic charge transport in graphene and light propagation in periodic dielectric structures with metamaterials: a comparative study
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• Giant optical nonlocality near the Dirac point in metal-dielectric multilayer metamaterials
• Conical diffraction and the dispersion surface of hyperbolic metamaterials
• Zero refractive index in space-time acoustic metamaterials
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• Conical Wave Propagation and Diffraction in 2D Hexagonally Packed Granular Lattices
• Quasi-flat bands in waveguide arrays
• Circular edge states in photonic crystals with a Dirac node
• Transverse Anderson localization of light near Dirac points of photonic nanostructures