Numéro
Le Journal de Physique IV
Volume 03, Numéro C5, Octobre 1993
Third International Conference on Optics of Excitons in Confined
Page(s) C5-151 - C5-154
DOI http://dx.doi.org/10.1051/jp4:1993527
Third International Conference on Optics of Excitons in Confined

Le Journal de Physique IV 03 (1993) C5-151-C5-154

DOI: 10.1051/jp4:1993527

Time-resolved resonance Raman scattering and luminescence from confined excitons in AgBr quantum dots

S. PAWLIK, U. SCHOLLE, Th. WEBER, H. STOLZ and W. VON DER OSTEN

Fachbereich Physik, Universität-GH, 33095 Paderborn, Germany


Abstract
Resonantly excited low temperature Raman scattering and luminescence are investigated in AgBr microcrystals produced in reversed micelles. The crystallite size is close to the exciton Bohr radius in the bulk resulting in a blue shift of the luminescence. Under excitation resonant with the exciton one and two phonon Raman scattering is observed involving TO(L), LO(T) and odd parity L-phonons, respectively. The temporal behaviour of these processes after pulsed excitation reflects the decay of the confined exciton states. The lifetime is found of the order of 500 µs and mostly determined by radiative decay.



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