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Angle-dependent polariton collisional broadening in semiconductor microcavities

✍ Scribed by Agnès Huynh; Jérôme Tignon; Olof Larsson; Philippe Roussignol; Claude Delalande; Régis André; Robert Romestain; Le Si Dang

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
82 KB
Volume
17
Category
Article
ISSN
1386-9477

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✦ Synopsis

The polariton nonlinear dynamics in a II-VI semiconductor microcavity has been studied using angle-resolved four-wave mixing. The low-energy polariton dephasing time is found to decrease at large angles, when polariton can escape towards the excitonic reservoir, in good agreement with a calculation of the angle-dependent collisional broadening. Moreover, we ÿnd that the parametric ampliÿcation of k = 0 polaritons is associated to a strong quenching of the coherence at the magic angle.

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