ACTA

Luminescence Decay in Deep Quantum Wells CdTe/Cd_0.5Mn_0.5Te at Room Temperature

L. Kowalczyk^a, S. Fancey^b, G.S. Buller^b, J.S. Massa^b, M. Kutrowski^a, E. Janik^a, G. Karczewski^e, T. Wojtowicz^a, A.K. Zakrzewski^a and J. Kossut^a
^aInstitute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland
^bDepartment of Physics, Heriot-Watt University, Edinburgh, Great Britain

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Time-resolved photoluminescence was used to study exciton recombination in deep CdTe/Cd_0.5Mn_0.5Te single quantum well. The width of the investigated well was 100 A. The study was performed at room temperature. The lifetime of the exciton determined in this work has a value comparable to that observed in shallow CdTe/Cd_0.85Mn_0.15Te quantum wells. A strong enhancement of the photoluminescence decay time with increasing intensity of the exciting laser beam is observed which is indicative of saturation of the non-radiative recombination centers.

DOI: 10.12693/APhysPolA.87.508
PACS numbers: 78.47.+p, 78.55.Et, 78.66.Hf