Structured complex potentials for designer topological systems and devices in optics

实验演示了一种新的技术，通过两个频率锁定的激光器的跳动，非共振时间调制的极化激元凝聚。这使得非常快的调制，和探测的非绝热制度的载流子relaxation.Combining强度拍频与激光波前剪裁，任意的空间潜力与时间调制形成。一个一维的传送带已被证明，与倾斜的带和一个非螺旋推动的冷凝物的观察。此外，利用拉盖尔-高斯激光模式，实现了对非共振旋转极化激元凝聚体的初步测量，这些新技术使尚未探索的方法能够产生激子-极化激元的拓扑态，例如通过快速旋转或通过振动光学晶格。

Experimentally demonstrated a new technique for non-resonant temporal modulation of polariton condensates via the beating of two, frequency-locked lasers. This allows for very fast modulation, and probing of non-adiabatic regimes of carrier relaxation.Combining the intensity beating with laser-wavefront tailoring, arbitrary spatial potentials with temporal modulation are formed. A 1D conveyor belt has been demonstrated, with the observation of tilted bands and a non-adiabatically pushed condensate. Further, using Laguerre-Gauss laser modes, preliminary measurements of a non-resonantly rotated polariton condensate were achieved.These new techniques enable as-yet unexplored methods of creating topological states of exciton-polaritons, e.g. by rapid rotation, or by shaken optical lattices.