论文标题
分散微腔中的subband polariton-polariton散射
Intersubband polariton-polariton scattering in a dispersive microcavity
论文作者
论文摘要
使用具有相位稳定的中红外脉冲的非分线泵 - 探针几何形状直接研究了嵌入GAAS/ALGAAS量子井的分散腔中嵌入GAAS/ALGAAS量子孔中的超级散射动力学。在〜25 thz的频率和有限的平面动量下，$ k_ {||} $的选择性激发，导致探针反射率在$ k_ {|||} = 0 $中的窄带最大值的出现。量子机械模型将基本的微观过程识别为刺激的相干偏极散射。这些结果标志着在中和远红外的量化极化系统中，量子控制和骨气激光的重要里程碑。
The ultrafast scattering dynamics of intersubband polaritons in dispersive cavities embedding GaAs/AlGaAs quantum wells are studied directly within their band structure using a non-collinear pump-probe geometry with phase-stable mid-infrared pulses. Selective excitation of the lower polariton at a frequency of ~25 THz and at a finite in-plane momentum, $k_{||}$, leads to the emergence of a narrowband maximum in the probe reflectivity at $k_{||}=0$. A quantum mechanical model identifies the underlying microscopic process as stimulated coherent polariton-polariton scattering. These results mark an important milestone towards quantum control and bosonic lasing in custom-tailored polaritonic systems in the mid and far-infrared.
