期刊
PHYSICAL REVIEW LETTERS
卷 127, 期 7, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.127.073601
关键词
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资金
- European Union's Horizon 2020 research and innovation program [732894, 713450, 945915]
- Spanish State Research Agency [PGC2018-094490-BC21]
- Juilan Schwinger Foundation [JSF-16-03-0000]
- Generalitat Valenciana [PROMETEO/2019/123, BEST/2020/178, IDIFEDER/2018/033]
- European Research Council (ERC) [759644-TOPP]
The study demonstrates that mode-locked, multimode phonon lasing can be achieved in a multimode optomechanical system through Floquet dynamics induced by temporally modulated laser drive, resulting in significantly improved long-term frequency stability.
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 mode-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 mode locking. These results provide a path toward highly stable ultracompact oscillators, pulsed phonon lasing, coherent waveform synthesis, and emergent many-mode phenomena in oscillator arrays.
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