Intersubband polariton-polariton scattering in a dispersive microcavity

Abstract

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.

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Cited by in corpus (8)

• Berry Phase and Topology in Ultrastrongly Coupled Quantum Light-Matter Systems
• Low intensity saturation of an ISB transition by a mid-IR quantum cascade laser
• THz ultra-strong light-matter coupling up to 200K with continuously-graded parabolic quantum wells
• Theory of coherent optical nonlinearities of intersubband transitions in semiconductor quantum wells
• Detection of strong light-matter interaction in a single nano-cavity with a thermal transducer
• Resonant tunneling diodes in semiconductor microcavities: modeling polaritonic features in the THz displacement current
• An effective density matrix approach for intersubband plasmons coupled to a cavity field: electrical extraction/injection of intersubband polaritons
• Magnetic-field-induced cavity protection for intersubband polaritons