# 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}
}
• Published 3 July 2014
• Physics
• Physical Review A
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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