We report the existence of Weyl points in a class of non-central symmetric metamaterials, which has time reversal symmetry, but does not have inversion symmetry due to chiral coupling between electric and magnetic fields. This class of metamaterial exhibits either type-I or type-II Weyl points depending on its non-local response. We also provide a physical realization of such metamaterial consisting of an array of metal wires in the shape of elliptical helixes which exhibits type-II Weyl points.
@article{arxiv.1604.00574,
title = {Hyperbolic Weyl point in reciprocal chiral metamaterial},
author = {Meng Xiao and Qian Lin and Shanhui Fan},
journal= {arXiv preprint arXiv:1604.00574},
year = {2016}
}