ACTA

Exciton Properties in CdTe/CdMnTe Quantum Well Structures with Strong Localization Effects

M. Godlewski^a, R. Narkowicz^a,b, T. Wojtowicz^a, G. Karczewski^a, J. Kossut^a, J.P. Bergman^c and B. Monemar^c
^aInstitute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland
^bSemiconductor Physics Institute, A. Gostauto 11, 2600 Vilnius, Lithuania
^cDept. Phys. & Meas. Technol., Linköping Univ., 581 83 Linköping, Sweden

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Strong localization effects present in quantum well structures of CdTe/ CdMnTe noticeably affect exciton dynamics and strength and character of exciton-phonon interaction. We show that the temperature dependences of the PL linewidth, PL peak wavelength and PL decay time strongly deviate from those expected for Wannier-excitons in structures with atomically smooth interfaces.

DOI: 10.12693/APhysPolA.94.317
PACS numbers: 71.35.-y, 71.55.Jv, 73.20.Mf