Title: Intersubband polariton -- LO phonon interaction in mid-infrared non-dispersive cavities: experimental demonstration of spontaneous scattering and perspectives towards polariton lasing Show Chinese title

Title: 中红外非色散腔中的激子极化子-LO声子相互作用：自发散射的实验演示及极化子激光的前景

Abstract: We report experimental evidence of the interaction between intersubband polaritons and longitudinal optical phonons in non-dispersive mid-infrared cavities, under resonant optical injection. The light emission originating from spontaneous polariton-phonon scattering is observed at a frequency corresponding to an energy shift of one phonon below the pump frequency. Given the extremely low spontaneous scattering rate, we employ a custom-developed quantum mechanical model to numerically demonstrate the feasibility to stimulate such process using a pump-probe scheme. Based on this analysis, we identify a set of experimental conditions under which optical gain may be realized in a mid-infrared intersubband polaritonic system. Show Chinese abstract

Abstract: 我们报告了在共振光注入下，非色散中红外腔中介于亚带极化子和纵向光学声子之间的相互作用的实验证据。 来自自发极化子-声子散射的光发射在对应于泵浦频率以下一个声子能量的频率处被观察到。 鉴于自发散射率极低，我们采用自定义开发的量子力学模型，数值演示了使用泵浦-探测方案激发该过程的可行性。 基于此分析，我们确定了一组实验条件，在这些条件下可能在中红外亚带极化子系统中实现光增益。