Intersubband Polariton-Polariton Scattering in a Dispersive Microcavity
Résumé
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 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.
Domaines
Physique [physics]
Fichier principal
Knorr et al. - 2022 - Intersubband polariton-polariton scattering in a d.pdf (1.07 Mo)
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