Vertical Motional Narrowing of Exciton-Polaritons in GaN Based Multiple Quantum Wells
BLAISE PASCAL UNIV CLERMONT-FERRAND (FRANCE) LAB DE SCIENCES ET MATERIAUX POUR L'ELECTRONIQUE ET D'AUTOMATIQUE
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Numerical simulation of time-resolved light reflection from GaNAlGaN single and multi-quantum wells MQWs revealed a pronounced vertical motional narrowing effect. This effect consists in reduction of the in homogeneous broadening of the exciton peaks and increase of the decay-time of the time-resolved reflection due to the averaging of the vertical disorder in the structure by extended exciton-polariton modes. The theory predicts pronounced oscillations in the time-resolved reflection of MQWs resulting from the interference of exciton-polariton modes in the structure.
- Solid State Physics