Centro Atómico Bariloche and Instituto Balseiro, Comisión Nacional de Energía Atómica (CNEA) - Universidad Nacional de Cuyo (UNCUYO), 8400, Bariloche, Argentina.
Instituto de Nanociencia y Nanotecnología (INN-Bariloche), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bariloche, Argentina.
Nat Commun. 2023 Jun 19;14(1):3485. doi: 10.1038/s41467-023-38788-9.
Lattices of exciton-polariton condensates represent an attractive platform for the study and implementation of non-Hermitian bosonic quantum systems with strong non-linear interactions. The possibility to actuate on them with a time dependent drive could provide for example the means to induce resonant inter-level transitions, or to perform Floquet engineering or Landau-Zener-Stückelberg state preparation. Here, we introduce polaromechanical metamaterials, two-dimensional arrays of μm-sized traps confining zero-dimensional light-matter polariton fluids and GHz phonons. A strong exciton-mediated polariton-phonon interaction induces a time-dependent inter-site polariton coupling J(t) with remarkable consequences for the dynamics. When locally perturbed by continuous wave optical excitation, a mechanical self-oscillation sets-in and polaritons respond by locking the energy detuning between neighbor sites at integer multiples of the phonon energy, evidencing asynchronous locking involving the polariton and phonon fields. These results open the path for the coherent control of dissipative quantum light fluids with hypersound in a scalable platform.
激子极化激元凝聚体的格子结构为研究和实现具有强非线性相互作用的非厄米玻色量子系统提供了一个有吸引力的平台。通过随时间变化的驱动对其进行作用，例如可以提供诱导共振能级间跃迁的手段，或者执行 Floquet 工程或朗道-津纳-斯图克尔伯格态制备。在这里，我们引入了极化机械超材料，这是一种二维的 μm 大小的陷阱阵列，用于限制零维的光物质极化激元流体和 GHz 声子。强烈的激子介导的极化激元-声子相互作用会导致随时间变化的局域极化激元耦合 J(t)，这对动力学有显著的影响。当受到连续波光激发的局部扰动时，会产生机械自激振荡，而极化激元通过将相邻位点之间的能量失谐锁定在声子能量的整数倍来响应，这表明涉及极化激元和声子场的异步锁定。这些结果为在可扩展平台中使用超音波对耗散量子光流体进行相干控制开辟了道路。
