Abstract
The dephasing of excitons in self-organized CdSe/ZnSe islands
grown by molecular-beam epitaxy is investigated using spectrally
resolved four-wave mixing. A distribution of dephasing times is
observed, indicating the existence of localized excitons with
different relaxation times at comparable transition energies.
Polarization-dependent measurements identify the formation of
biexcitons. The observed large biexciton binding energy of 22meV
increases with decreasing exciton energy, which is attributed to
an increasing three-dimensional confinement.
| Original language | English |
|---|---|
| Journal | Journal of Crystal Growth |
| Volume | 214-215 |
| Pages (from-to) | 747-751 |
| ISSN | 0022-0248 |
| Publication status | Published - 2000 |