Floquet phonon lasing in multimode optomechanical systems
Abstract
Dynamical radiation pressure effects in cavity optomechanical systems give rise to self-sustained oscillations or `phonon lasing' behavior, producing stable oscillators up to GHz frequencies in nanoscale devices. Like in photonic lasers, phonon lasing normally occurs in a single mechanical mode. We show here that phase-locked, multimode phonon lasing can be established in a multimode optomechanical system through Floquet dynamics induced by a temporally modulated laser drive. We demonstrate this concept in a suitably engineered silicon photonic nanocavity coupled to multiple GHz-frequency mechanical modes. We find that the long-term frequency stability is significantly improved in the multimode lasing state as a result of the phase locking. These results provide a path towards highly stable ultra-compact oscillators, pulsed phonon lasing, coherent waveform synthesis, and emergent many-mode phenomena in oscillator arrays.
Cite
@article{arxiv.2101.10788,
title = {Floquet phonon lasing in multimode optomechanical systems},
author = {Laura Mercadé and Karl Pelka and Roel Burgwal and André Xuereb and Alejandro Martínez and Ewold Verhagen},
journal= {arXiv preprint arXiv:2101.10788},
year = {2021}
}