We demonstrate a synthetic gauge field for phonon transport in a nano-optomechanical platform. Employing time-modulated radiation pressure forces, we evidence nonreciprocal nanomechanical phase transfer. We show how this enables new classes of phononic topological insulators.

Photonic Forces

Mathew, J., del Pino, J., & Verhagen, E. (2019). Dynamical gauge fields for phonons in an optomechanical system. In Conference on Lasers and Electro-Optics, paper FM1A.2. doi:10.1364/cleo_qels.2019.fm1a.2