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

• Main Authors: Sun, Yong, Leykam, Daniel, Nenni, Stephen, Song, Daohong, Chen, Hong, Chong, Yi Dong, Chen, Zhigang
• 其他作者: School of Physical and Mathematical Sciences
• 格式: Article
• 語言: English
• 出版: 2018
• 主題: DRNTU::Science::Physics; Bloch Oscillation (BO); Landau-Zener Tunneling (LZT)
• 在線閱讀: https://hdl.handle.net/10356/87902; http://hdl.handle.net/10220/45605

We demonstrate intervalley Bloch oscillation (BO) and Landau-Zener tunneling (LZT) in an optically induced honeycomb lattice with a refractive-index gradient. Unlike previously observed BO in a gapped square lattice, we show nonadiabatic beam dynamics that are highly sensitive to the direction of th...