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.
| Original language | English |
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| Journal | IPPS physica status solidi (b) |
| Volume | 221 |
| Issue number | 1 |
| Pages (from-to) | 115-120 |
| ISSN | 0370-1972 |
| DOIs | |
| Publication status | Published - 2000 |
| Event | 6th International Workshop on Nonlinear Optics and Excitation Kinetics in Semiconductors - Marburg, Germany Duration: 10 Apr 2000 → 13 Apr 2000 Conference number: 6 |
Workshop
| Workshop | 6th International Workshop on Nonlinear Optics and Excitation Kinetics in Semiconductors |
|---|---|
| Number | 6 |
| Country/Territory | Germany |
| City | Marburg |
| Period | 10/04/2000 → 13/04/2000 |