Robust Polariton Bose–Einstein Condensation Laser via a Strong Coupling Microcavity

Robust polariton in the strong‐coupling regime plays a central role in understanding Bose–Einstein condensation (BEC), which is also an ideal platform for the simulation of bosonization processes and novel engineering polariton devices that are related to quantum phase transitions. A two‐dimensional ZnO nanoplate is firstly utilized to construct microcavity polaritons, and a robust polariton BEC laser is successfully realized at room temperature (RT). High stability of the exciton state and the enhanced coupling strength in the nanoplate cavity are effective for polaritons. The giant Rabi splitting of 120 meV is extracted from the RT dispersion pattern. The evolution of polariton BEC exhibits a typical blue‐shift, and its saturation behavior shows that the interaction strength of the polaritons is deduced from the energy renormalization. Remarkably, the value of the interaction strength is two orders of magnitude higher than reported values, which implies that many‐body correlation may be dominant in the polariton strongly interacting polariton systems. The results open up the prospect of realizing robust polariton BEC lasers at high temperature. A nanoplate microcavity is utilized to realize robust polaritons in the strong‐coupling regime. With an increase of the exciton density, the polaritons undergo a transition to Bose–Einstein condensation lasing. Its evolution presents the typical blue‐shift, and its saturation behavior shows that the interaction strength, which is two orders of magnitude higher than reported values, is deduced from the renormalization.