Zhang Deng-Wei, Bin Shang-Wu, You Cai, Hu Chang-Sheng
Opt Express. 2022 Jan 17;30(2):1314-1326. doi: 10.1364/OE.446428.
We theoretically investigate the nonlinear dynamics of an optomechanical system, where the system consists of N identical mechanical oscillators individually coupled to a common cavity field. We find that the optomechanical nonlinearity can be enhanced N times through theoretical analysis and numerical simulation in such a system. This leads to the power thresholds to observe the nonlinear behaviors (bistable, period-doubling, and chaotic dynamics) being reduced to 1/N. In addition, we find that changing the sign (positive or negative) of the coupling strength partly does not affect the threshold of driving power for generating corresponding nonlinear phenomena. Our work may provide a way to engineer optomechanical devices with a lower threshold, which has potential applications in implementing secret information processing and optical sensing.
我们从理论上研究了一个光机械系统的非线性动力学，该系统由N个相同的机械振子组成，每个振子都单独耦合到一个公共腔场。通过理论分析和数值模拟，我们发现在这样的系统中光机械非线性可以增强N倍。这导致观察非线性行为（双稳态、倍周期和混沌动力学）的功率阈值降低到1/N。此外，我们发现部分改变耦合强度的符号（正或负）并不影响产生相应非线性现象的驱动功率阈值。我们的工作可能为设计具有较低阈值的光机械设备提供一种方法，这在实现秘密信息处理和光学传感方面具有潜在应用。
