Observation of valley Landau-Zener-Bloch oscillations and pseudospin imbalance in photonic graphene

Yong Sun, Daniel Leykam, Stephen Nenni +4

We demonstrate inter-valley Bloch oscillation (BO) and Landau-Zener tunneling (LZT) in an optically-induced honeycomb lattice with a refractive index gradient. Unlike previously ob…