TY - JOUR
T1 - Time-resolved photoluminescence and steady-state optical studies of GaInNAs and GaInAs single quantum wells
AU - Sun, Y.
AU - Lombez, L.
AU - Braun, P. F.
AU - Ulug, B.
AU - Ulug, A.
AU - Yilmaz, M.
AU - Balkan, N.
AU - Marie, X.
AU - Carrere, H.
AU - Arnoult, A.
PY - 2007
Y1 - 2007
N2 - Time-resolved photoluminescence spectroscopy is used to investigate carrier dynamics of Ga1-xInxNyAs1-y (x ∼ 0.33, y ∼ 0.01) single quantum well (QW) structures. PL spectra measured as a function of temperature together with the PL decay times at wavelengths around and below the PL peak energy are used to determine de-trapping activation energies and time constants. The results are interpreted in terms of simultaneous thermal excitation of deep localized excitons to shallow localized states. According to the model, with increasing temperatures, localized excitons gain enough thermal energy to populate the free exciton states in quantum well with shorter lifetimes due to coherent nature of free excitons. In addition, at temperatures around and above 80 K, more non-radiative channels become available to compete with the radiative processes leading to shorter time constants.
AB - Time-resolved photoluminescence spectroscopy is used to investigate carrier dynamics of Ga1-xInxNyAs1-y (x ∼ 0.33, y ∼ 0.01) single quantum well (QW) structures. PL spectra measured as a function of temperature together with the PL decay times at wavelengths around and below the PL peak energy are used to determine de-trapping activation energies and time constants. The results are interpreted in terms of simultaneous thermal excitation of deep localized excitons to shallow localized states. According to the model, with increasing temperatures, localized excitons gain enough thermal energy to populate the free exciton states in quantum well with shorter lifetimes due to coherent nature of free excitons. In addition, at temperatures around and above 80 K, more non-radiative channels become available to compete with the radiative processes leading to shorter time constants.
UR - http://www.scopus.com/inward/record.url?scp=50049091560&partnerID=8YFLogxK
U2 - 10.1002/pssc.200673276
DO - 10.1002/pssc.200673276
M3 - Conference article
AN - SCOPUS:50049091560
SN - 1862-6351
VL - 4
SP - 667
EP - 670
JO - Physica Status Solidi (C) Current Topics in Solid State Physics
JF - Physica Status Solidi (C) Current Topics in Solid State Physics
IS - 2
T2 - International Conference on Superlattices, Nano-structures and Nano-devices, ICSNN-2006
Y2 - 30 July 2006 through 4 August 2006
ER -