TY - JOUR
T1 - Quantum dot exciton dynamics through a nanoaperture
T2 - Evidence for two confined states
AU - Robinson, L. M.
AU - Rho, H.
AU - Kim, J. C.
AU - Jackson, Howard E.
AU - Smith, L. M.
AU - Lee, S.
AU - Dobrowolska, M.
AU - Furdyna, J. K.
PY - 1999/1/1
Y1 - 1999/1/1
N2 - Excitons confined to CdSe/ZnSe self-assembled quantum dots are probed through a nanoaperture using time-resolved photoluminescence. Significant evidence is shown that two different electronic states are associated with these dots, with binding energies which differ by an order of magnitude. The first has a short 450 ps lifetime, exhibits a relatively broad emission line, and persists nearly to room temperature; the second exhibits a long (> 4 ns) lifetime and is responsible for the sharp (˜100 μeV) lines seen at low temperatures (< 60 K). These results are completely unlike those seen in III-V dots, and reveal the complexity of the electronic structure in CdSe dots.
AB - Excitons confined to CdSe/ZnSe self-assembled quantum dots are probed through a nanoaperture using time-resolved photoluminescence. Significant evidence is shown that two different electronic states are associated with these dots, with binding energies which differ by an order of magnitude. The first has a short 450 ps lifetime, exhibits a relatively broad emission line, and persists nearly to room temperature; the second exhibits a long (> 4 ns) lifetime and is responsible for the sharp (˜100 μeV) lines seen at low temperatures (< 60 K). These results are completely unlike those seen in III-V dots, and reveal the complexity of the electronic structure in CdSe dots.
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U2 - 10.1103/PhysRevLett.83.2797
DO - 10.1103/PhysRevLett.83.2797
M3 - Article
AN - SCOPUS:0001604672
VL - 83
SP - 2797
EP - 2800
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 14
ER -