Wen Wen, Liang Jie, Xu Huawen, Jin Feng, Rubo Yuri G, Liew Timothy C H, Su Rui
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, <a href="https://ror.org/02e7b5302">Nanyang Technological University</a>, 637371 Singapore.
Instituto de Energías Renovables, <a href="https://ror.org/01tmp8f25">Universidad Nacional Autónoma de México</a>, Temixco, Morelos 62580, Mexico.
Phys Rev Lett. 2024 Sep 13;133(11):116903. doi: 10.1103/PhysRevLett.133.116903.
We report the experimental observation of trembling quantum motion, or Zitterbewegung, of exciton polaritons in a perovskite microcavity at room temperature. By introducing liquid-crystal molecules into the microcavity, we achieve spinor states with synthetic Rashba-Dresselhaus spin-orbit coupling and tunable energy splitting. Under a resonant excitation, the polariton fluid exhibits clear trembling motion perpendicular to its flowing direction, accompanied by a unique spin pattern resembling interlocked fingers. Furthermore, leveraging the sizable tunability of energy gaps by external electrical voltages, we observe the continuous transition of polariton Zitterbewegung from relativistic (small gaps) to nonrelativistic (large gaps) regimes. Our findings pave the way for using exciton polaritons in the emulation of relativistic quantum physics.
我们报道了室温下钙钛矿微腔中激子极化激元的颤抖量子运动（即颤动）的实验观测结果。通过将液晶分子引入微腔，我们实现了具有合成Rashba-Dresselhaus自旋轨道耦合和可调谐能量分裂的旋量态。在共振激发下，极化激元流体呈现出垂直于其流动方向的清晰颤抖运动，并伴有独特的类似交锁手指的自旋模式。此外，利用外部电压对能隙的显著可调性，我们观察到极化激元颤动从相对论性（小能隙）到非相对论性（大能隙） regime的连续转变。我们的发现为在相对论量子物理模拟中使用激子极化激元铺平了道路。
