Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 2797-2800 |
| Number of pages | 4 |
| Journal | Physical Review Letters |
| Volume | 83 |
| Issue number | 14 |
| DOIs | |
| Publication status | Published - 1999 Jan 1 |
| Externally published | Yes |
Fingerprint
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Quantum dot exciton dynamics through a nanoaperture : Evidence for two confined states. / Robinson, L. M.; Rho, H.; Kim, J. C.; Jackson, Howard E.; Smith, L. M.; Lee, Sang Hoon; Dobrowolska, M.; Furdyna, J. K.
In: Physical Review Letters, Vol. 83, No. 14, 01.01.1999, p. 2797-2800.Research output: Contribution to journal › Article
}
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, Sang Hoon
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.
UR - http://www.scopus.com/inward/record.url?scp=0001604672&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0001604672&partnerID=8YFLogxK
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 -