We designed and fabricated a time-reversal invariant Weyl photonic crystal that possesses single Weyl nodes with topological charge of 1 and double Weyl nodes with a higher topological charge of 2. Using numerical simulations and microwave experiment, nontrivial band gaps with nonzero Chern numbers for a fixed kz was demonstrated. The robustness of the surface state between the Weyl photonic crystal and PEC against kz-conserving scattering was experimentally observed.
@article{arxiv.1512.04681,
title = {Experimental observation of robust surface states on photonic crystals possessing single and double Weyl points},
author = {Wen-Jie Chen and Meng Xiao and C. T. Chan},
journal= {arXiv preprint arXiv:1512.04681},
year = {2015}
}