Wu-Hu 2015 / Ma-Shvets 2016 valley-Hall photonic crystals: K/K' valleys in honeycomb lattices generate valley-polarized edge states; experimentally demonstrated at microwave + photonic.
Wu-Hu 2015 / Ma-Shvets 2016 valley-Hall photonic crystals: K/K' valleys in honeycomb lattices generate valley-polarized edge states; experimentally demonstrated at microwave + photonic.