Optical parametric oscillations (OPOs)—the nonlinear coherent coupling of an optically excited two-particle pump state to signal and idler states correlated in energy—is relevant for optical amplification and generation of correlated photons. OPOs require states with well-defined symmetries and energies; the fine-tuning of material properties and structural dimensions remains a challenge for the realization of scalable OPOs in semiconductor nanostructures. Here we demonstrate a pathway towards arrays of OPOs based on the dynamic control of microcavity exciton-polaritons confined in micrometer-sized intracavity traps by an acoustic wave. The spatially varying strain field of the wave induces state-dependent energy shifts of discrete polariton levels with the appropriate symmetry for OPO triggering. The robustness of the dynamic acoustic tuning is demonstrated by the synchronous excitation of an array of confined OPOs using a single wave, which thus opens the way for the realization of scalable nonlinear on-chip systems.

中文翻译：

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动态调谐的极化子参量振荡器阵列

光学参量振荡（OPO）是光激发的两粒子泵浦状态与能量相关的信号和惰轮状态之间的非线性相干耦合，与光学放大和相关光子的产生有关。OPO要求状态具有明确定义的对称性和能量。材料特性和结构尺寸的微调仍然是实现半导体纳米结构中可扩展OPO的挑战。在这里，我们通过声波将微腔激子-极化子限制在微米大小的腔内陷阱中，从而对OPO阵列进行了演示。波在空间上变化的应变场会诱发具有离散性的极化子能级的状态相关的能量移位，并且具有适当的对称性来触发OPO。