Intersubband Polariton-Polariton Scattering in a Dispersive Microcavity

Knorr, M.

; Manceau, J. M.

; Mornhinweg, J.

; Nespolo, J. ; Biasiol, G. ; Tran, N. L. ; Malerba, M. ; Goulain, P.

; Lafosse, X.

; Jeannin, M.

; Stefinger, M. ; Carusotto, I. ; Lange, C.

; Colombelli, R.

; Huber, R.

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Zusammenfassung

The ultrafast scattering dynamics of intersubband polaritons in dispersive cavities embedding GaAs/AlGaAs quantum wells are studied directly within their band structure using a noncollinear pump-probe geometry with phase-stable midinfrared pulses. Selective excitation of the lower polariton at a frequency of similar to 25 THz and at a finite in-plane momentum k(parallel to) leads to the emergence ...