Author(s): Scott A. Skirlo, Ling Lu, Yuichi Igarashi, Qinghui Yan, John Joannopoulos, and Marin Soljačić
A two-dimensional photonic crystal has multiple topologically protected channels, which can be used to transmit and reroute light without scattering losses.
[Phys. Rev. Lett. 115, 253901] Published Mon Dec 14, 2015