TY - JOUR
T1 - Exciton radiative lifetime of quantum rods in reflectivity
AU - Sreenivasan, D.
AU - Haverkort, J.E.M.
AU - Maksimenko, S.A.
AU - Slepyan, G.Y.
AU - He, J.
AU - Nötzel, R.
PY - 2008
Y1 - 2008
N2 - Time-resolved differential reflectivity (TRDR) experiments were performed on columnar InAs/GaAs quantum rods (QRs). Aresonant-like enhancement of the exciton radiative lifetime near the centre of the inhomogeneously broadened QR-size distribution isobserved. At low pump excitation density, the TRDR decay time shows the expected excitonic behaviour. At increased pump excitation,a quasi-resonant radiative lifetime develops, which seems to be dependent on the excited QR density being resonant with the probe laserspectrum. The resonance is interpreted as due to electromagnetic coupling between randomly distributed excited QRs that are resonantwith the probe laser.
AB - Time-resolved differential reflectivity (TRDR) experiments were performed on columnar InAs/GaAs quantum rods (QRs). Aresonant-like enhancement of the exciton radiative lifetime near the centre of the inhomogeneously broadened QR-size distribution isobserved. At low pump excitation density, the TRDR decay time shows the expected excitonic behaviour. At increased pump excitation,a quasi-resonant radiative lifetime develops, which seems to be dependent on the excited QR density being resonant with the probe laserspectrum. The resonance is interpreted as due to electromagnetic coupling between randomly distributed excited QRs that are resonantwith the probe laser.
U2 - 10.1016/j.physe.2007.09.062
DO - 10.1016/j.physe.2007.09.062
M3 - Article
SN - 1386-9477
VL - 40
SP - 1985
EP - 1987
JO - Physica E: Low-Dimensional Systems & Nanostructures
JF - Physica E: Low-Dimensional Systems & Nanostructures
IS - 6
ER -