论文标题
mapbbr3钙钛矿中的室温极化层介导的极化非线性
Room-temperature polaron-mediated polariton nonlinearity in MAPbBr3 perovskites
论文作者
论文摘要
支持激子 - 孔子的系统代表固态光学平台，具有强大的内置光学非线性，由Ickiton-exciton Itsp《相互作用提供）。在具有氢样激子的常规半导体中，非线性率证明了与结合能的逆缩放率。这使激子在室温下稳定弱相互作用，这显然限制了非线性光子学材料实际应用的可能性。我们在实验和理论上证明了这些局限性可以在混合钙化物（例如Mapbbr3）中大大软化，因为载体效应介导了粒子间相互作用的至关重要的作用。在室温下，所得的激子 - 孔孔 - 果龙在室温下保持稳定和强烈相互作用，在谐振的飞秒激光脉冲激发下，下极polariton分支能量的大型非线性蓝光证实。我们的发现开放了在环境条件下管理激子 - 帕利顿非线性的新观点。
Systems supporting exciton-polaritons represent solid-state optical platforms with a strong built-in optical nonlinearity provided by exciton-exciton interactions. In conventional semiconductors with hydrogen-like excitons the nonlinearity rate demonstrates the inverse scaling with the binding energy. This makes excitons stable at room temperatures weakly interacting, which obviously limits the possibilities of practical applications of the corresponding materials for nonlinear photonics. We demonstrate experimentally and theoretically, that these limitations can be substantially softened in hybrid perovskites, such as MAPbBr3 due to the crucial role of the polaron effects mediating the inter-particle interactions. The resulting exciton-polaron-polaritons remain both stable and strongly interacting at room temperature, which is confirmed by large nonlinear blueshifts of lower polariton branch energy under resonant femtosecond laser pulse excitation. Our findings open novel perspectives for the management of the exciton-polariton nonlinearities in ambient conditions.
