Seeding of Polariton Stimulation in a Homogeneously Broadened Microcavity

John Erland Østergaard, Vygantas Mizeikis, Wolfgang Werner Langbein, Jacob Riis Jensen, Niels Asger Mortensen, Jørn Märcher Hvam

Publikation: Bidrag til tidsskriftKonferenceartikelForskningpeer review

Abstract

In time-resolved light emission from a high-quality semiconductor microcavity after pulsed excitation suitable for angle-resonant polariton-polariton scattering on the lower-polariton branch, we find strong evidence for final-state stimulation of this process. The self-stimulated emission, following single-pulse excitation, appears on a fast time scale of only a few lens of ps with a maximum at 15 ps. This is in striking contrast to the photoluminescence decay time of 110 ps observed in the low-density limit. By injection of polaritons into the final state by a seeding pulse, the dynamics and the intensity of this emission can be controlled. The time-resolved data and the density dependences are in agreement with a rate equation model neglecting polarization mixing effects. This model gives a coupling coefficient of b(LP,k)=0 = 2.4 x 10(-9) cm(4) s(-1) for the stimulated angle-resonant polariton-polariton scattering process.
OriginalsprogEngelsk
TidsskriftIPPS physica status solidi (b)
Vol/bind221
Udgave nummer1
Sider (fra-til)115-120
ISSN0370-1972
DOI
StatusUdgivet - 2000
Udgivet eksterntJa
Begivenhed6th International Workshop on Nonlinear Optics and Excitation Kinetics in Semiconductors - Marburg, Tyskland
Varighed: 10. apr. 200013. apr. 2000
Konferencens nummer: 6

Workshop

Workshop6th International Workshop on Nonlinear Optics and Excitation Kinetics in Semiconductors
Nummer6
Land/OmrådeTyskland
ByMarburg
Periode10/04/200013/04/2000

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