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arXiv · 2101.10788

Floquet phonon lasing in multimode optomechanical systems

Laura Mercadé·Karl Pelka·Roel Burgwal·André Xuereb·Alejandro Martínez·Ewold Verhagen
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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.

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Laura Mercadé, Karl Pelka, Roel Burgwal, André Xuereb, Alejandro Martínez, Ewold Verhagen. 2021-01-26. Floquet phonon lasing in multimode optomechanical systems. https://doi.org/10.1103/physrevlett.127.073601

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