论文标题
注射锁定在光学机电相干声子源中
Injection locking in an optomechanical coherent phonon source
论文作者
论文摘要
基于自触发的自由载体/温度限制周期，在光学机械振荡器中证明了将相干声子源的相位自发锁定到外部参考。当将机械振荡器驱动到自我维持状态的泵激光器被辐射音调调节时，观察到同步。我们采用基于独立光腔的泵探针调子检测方案，仅观察机械振荡器动力学。振荡频率的锁定范围，即Arnold舌头，在一系列外部参考强度范围内通过实验确定，表明将振荡器频率调整为350 kHz的可能性。相干声子源的稳定性通过其相位噪声进行评估，对于100 MHz机械谐振器，在1KHz偏移时最大抑制了44 dBC/Hz。在激发激光器中引入弱调制，这表明是触发，控制和稳定基于自动化的基于自动化的光机电振荡器的动态解决方案的进一步旋钮，从而增强了它们作为单层硅平台中声波源的潜力。
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.
