Exciton radiative decay and homogeneous broadening in CdTe/Cd0.85Mn0.15Te multiple quantum wells

authored by

M. O'Neill, Michael Oestreich, Wolfgang W. Rühle, D. E. Ashenford

Abstract

Exciton resonances are observed in the room-temperature absorption and photoluminescence (PL) spectra of CdTe/Cd0.85Mn0.15Te multiple-quantum-well structures. Temperature-dependent absorption linewidth and PL decay measurements are reported. Above 45 K, exciton-LO-phonon scattering determines the homogeneous linewidth (H). High excitation intensities were used in the PL decay measurements so that delocalized excitons were created. The PL decay time is found to be a measure of the exciton radiative decay time between 45 and 145 K and it increases linearly with H/r(T), where r(T) is the fraction of excitons with transition frequencies in H. From 170 K nonradiative processes dominate the decay so that the PL decay time decreases with temperature.

External Organisation(s)

University of Hull
Max Planck Institute for Solid State Research (MPI-FKF)

Type

Article

Journal

Physical Review B

Volume

48

Pages

8980-8985

No. of pages

6

ISSN

0163-1829

Publication date

15.09.1993

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Condensed Matter Physics

Electronic version(s)

https://doi.org/10.1103/PhysRevB.48.8980 (Access: Unknown)