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

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  • University of Hull
  • Max-Planck-Institut für Festkörperforschung
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Details

OriginalspracheEnglisch
Seiten (von - bis)8980-8985
Seitenumfang6
FachzeitschriftPhysical Review B
Jahrgang48
Ausgabenummer12
PublikationsstatusVeröffentlicht - 15 Sept. 1993
Extern publiziertJa

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.

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Exciton radiative decay and homogeneous broadening in CdTe/Cd0.85Mn0.15Te multiple quantum wells. / O'Neill, M.; Oestreich, Michael; Rühle, Wolfgang W. et al.
in: Physical Review B, Jahrgang 48, Nr. 12, 15.09.1993, S. 8980-8985.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

O'Neill M, Oestreich M, Rühle WW, Ashenford DE. Exciton radiative decay and homogeneous broadening in CdTe/Cd0.85Mn0.15Te multiple quantum wells. Physical Review B. 1993 Sep 15;48(12):8980-8985. doi: 10.1103/PhysRevB.48.8980
O'Neill, M. ; Oestreich, Michael ; Rühle, Wolfgang W. et al. / Exciton radiative decay and homogeneous broadening in CdTe/Cd0.85Mn0.15Te multiple quantum wells. in: Physical Review B. 1993 ; Jahrgang 48, Nr. 12. S. 8980-8985.
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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.",
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Download

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T1 - Exciton radiative decay and homogeneous broadening in CdTe/Cd0.85Mn0.15Te multiple quantum wells

AU - O'Neill, M.

AU - Oestreich, Michael

AU - Rühle, Wolfgang W.

AU - Ashenford, D. E.

PY - 1993/9/15

Y1 - 1993/9/15

N2 - 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.

AB - 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.

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