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arXiv 2009.09012physics.opticscond-mat.mes-hallnlin.AOphysics.app-ph
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光机相干声子源的注入锁定

Injection locking in an optomechanical coherent phonon source

Guillermo Arregui, Martin Facundo Colombano, Jérémie Maire, Alessandro Pitanti, Nestor Eduardo Capuj, Amadeu Griol, Alejandro Martínez, Clivia Marfa Sotomayor T… 展开作者

Guillermo Arregui, Martin Facundo Colombano, Jérémie Maire, Alessandro Pitanti, Nestor Eduardo Capuj, Amadeu Griol, Alejandro Martínez, Clivia Marfa Sotomayor Torres, Daniel Navarro Urrios

摘要:

在基于自触发自由载流子/温度极限环的光机械振荡器中,证明了相干声子源的相位与外部参考的自发锁定。当驱动机械振荡器到自持状态的泵浦激光器被射频音调调制时,观察到同步。我们采用了一种基于独立光学腔的泵浦-探测声子探测方案,只观察机械振荡器动力学。振荡频率的锁定范围,即,阿诺德舌头,是实验确定的范围内的外部参考强度,证明可能性,以调整振荡器频率的范围高达350千赫。相干声子源的稳定性通过其相位噪声进行评估,对于100 MHz的机械谐振器,在1 kHz偏移处最大达到44 dBc/Hz的抑制。在激发激光器中引入弱调制揭示了作为触发、控制和稳定基于自脉冲的光机械振荡器的动态解的进一步旋钮,从而增强了它们作为单层硅平台中的声波源的潜力。

英文摘要:

Spontaneous locking of the phase of a coherent phonon source to an external reference is demonstrated in an optomechanical oscillator based on a self-triggered free-carrier/temperature limit cycle. Synchronization is observed when the pump laser driving the mechanical oscillator to a self-sustained state is modulated by a radiofrequency tone. We employ a pump-probe phonon detection scheme based on an independent optical cavity to observe only the mechanical oscillator dynamics. The lock range of the oscillation frequency, i.e., the Arnold tongue, is experimentally determined over a range of external reference strengths, evidencing the possibility to tune the oscillator frequency for a range up to 350 kHz. The stability of the coherent phonon source is evaluated via its phase noise, with a maximum achieved suppression of 44 dBc/Hz at 1kHz offset for a 100 MHz mechanical resonator. Introducing a weak modulation in the excitation laser reveals as a further knob to trigger, control and stabilise the dynamical solutions of self-pulsing based optomechanical oscillators, thus enhancing their potential as acoustic wave sources in a single layer silicon platform.

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