Highly Correlated Optomechanical Oscillations Manifested by an Anomalous Stabilization,Physical Review Letters

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Highly Correlated Optomechanical Oscillations Manifested by an Anomalous Stabilization
Physical Review Letters ( IF 8.1 ) Pub Date : 2024-09-04 , DOI: 10.1103/physrevlett.133.103602
Jinlian Zhang ₁ , Miguel Orszag ₂ , Min Xiao _{3,

4} , Xiaoshun Jiang _{3,

4} , Qing Lin ₁ , Bing He ₂

Affiliation

Driven by a sufficiently powerful pump laser, a cavity optomechanical system will stabilize in coupled oscillations of its cavity field and mechanical resonator. It was assumed that the oscillation will be continuously magnified upon enhancing the driving laser further. However, based on the nonlinear dynamics of the system, we find that the dynamical behaviors of the system are much more complex than this intuitive picture, especially when it is operated near the blue detuning point by the mechanical resonator’s intrinsic frequency. There exists an anomalous stabilization: depending on its intrinsic damping rate and the pump power, the mechanical resonator will metastably stay on one orbit of oscillation after another until it completely stabilizes on the final orbit it can reach. These orbits are consistent with the locked ones with almost fixed oscillation amplitudes, which are realized after the pump power becomes still higher. The oscillatory cavity field is seen to adjust its sidebands following the mechanical frequency shift due to optical spring effect, so that it always drives the mechanical resonator to near those locked orbits once the pump power is over a threshold. In the regimes with such correlation between cavity field sidebands and mechanical oscillation, the system’s dynamical attractors are confined on the locked orbits and chaotic motion is also excluded.

中文翻译：

由异常稳定表现出来的高度相关的光机械振荡

在足够强大的泵浦激光器的驱动下，腔光机械系统将稳定其腔场和机械谐振器的耦合振荡。假设进一步增强驱动激光器时，振荡将持续放大。然而，基于系统的非线性动力学，我们发现系统的动力学行为比这种直观的图片复杂得多，特别是当它通过机械谐振器的固有频率在蓝色失谐点附近运行时。存在一种反常稳定性：根据其固有阻尼率和泵浦功率，机械谐振器将亚稳态地停留在一个又一个振荡轨道上，直到它完全稳定在它可以到达的最终轨道上。这些轨道与泵浦功率变得更高后实现的具有几乎固定振荡幅度的锁定轨道一致。由于光学弹簧效应，振荡腔场会随着机械频移调整其边带，因此一旦泵浦功率超过阈值，它总是驱动机械谐振器接近那些锁定轨道。在空腔场边带和机械振荡之间具有这种相关性的情况下，系统的动态吸引子被限制在锁定轨道上，混沌运动也被排除在外。

更新日期：2024-09-05

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