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Article Dans Une Revue Physical Review Letters Année : 2022

Intersubband Polariton-Polariton Scattering in a Dispersive Microcavity

Giorgio Biasiol
Paul Goulain

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.
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hal-03863043 , version 1 (29-11-2022)

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Matthias Knorr, Jean-Michel Manceau, Joshua Mornhinweg, Jacopo Nespolo, Giorgio Biasiol, et al.. Intersubband Polariton-Polariton Scattering in a Dispersive Microcavity. Physical Review Letters, 2022, 128 (24), pp.247401. ⟨10.1103/PhysRevLett.128.247401⟩. ⟨hal-03863043⟩
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