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 |
ASJC Scopus subject areas
- Physics and Astronomy(all)
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Robinson, L. M., Rho, H., Kim, J. C., Jackson, H. E., Smith, L. M., Lee, S., Dobrowolska, M., & Furdyna, J. K. (1999). Quantum dot exciton dynamics through a nanoaperture: Evidence for two confined states. Physical review letters, 83(14), 2797-2800. https://doi.org/10.1103/PhysRevLett.83.2797