Physics – Condensed Matter – Materials Science
Scientific paper
2000-11-09
Solid State Communication 117 (2001) 395-400
Physics
Condensed Matter
Materials Science
4 pages, 3 figures
Scientific paper
10.1016/S0038-1098(00)00483-X
Using time correlated single photon counting combined with temperature dependent diffraction limited confocal photoluminescence spectroscopy we accurately determine, for the first time, the intrinsic radiative lifetime of single excitons confined within semiconductor quantum dots. Their lifetime is one (two) orders of magnitude longer than the intrinsic radiative lifetime of single excitons confined in semiconductor quantum wires (wells) of comparable confining dimensions. We quantitatively explain this long radiative time in terms of the reduced spatial coherence between the confined exciton dipole moment and the radiation electromagnetic field.
Dekel Erez
Ehrenfreund E.
Gershoni D.
Petroff Pierre M.
Regelman D. V.
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