# Conical diffraction and the dispersion surface of hyperbolic metamaterials

@article{Ballantine2014ConicalDA, title={Conical diffraction and the dispersion surface of hyperbolic metamaterials}, author={Kyle E. Ballantine and John F. Donegan and Paul R. Eastham}, journal={Physical Review A}, year={2014}, volume={90}, pages={013803} }

Hyperbolic metamaterials are materials in which at least one principal dielectric constant is negative. We describe the refractive index surface, and the resulting refraction effects, for a biaxial hyperbolic metamaterial, with principal dielectric constants $\epsilon_1<0$, $0<\epsilon_2\neq\epsilon_3$. In this general case the two sheets of the index surface intersect forming conical singularities. We derive the ray description of conical refraction in these materials, and show that it is…

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