Wagner, Hans Peter and Tranitz, H. P. and Preis, H. and Langbein, W. and Leosson, K. and Hvam, J. M. (1999) Exciton dephasing and biexciton binding in CdSe/ZnSe islands. PHYSICAL REVIEW B, 60 (15). pp. 10640-10643. ISSN 1098-0121, 1550-235X
Full text not available from this repository. (Request a copy)Abstract
The dephasing of excitons and the formation of biexcitons in self-organized CdSe/ZnSe islands grown by molecular-beam epitaxy is investigated using spectrally resolved four-wave mixing. A distribution of exciton-exciton scattering efficiencies and dephasing times in the range of 0.5-10 ps are observed. This indicates the presence of differently localized exciton states at comparable transition energies. Polarization-dependent measurements identify the formation of biexcitons with a biexciton binding energy of more than four times the bulk value. With decreasing exciton energy, the binding energy slightly increases from 21.5 to 23 meV, while its broadening decreases from 5.5 to 3 meV. This is attributed to a strong three-dimensional confinement with improving shape uniformity for decreasing exciton energy. [S0163-1829(99)04739-6].
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | QUANTUM-DOT STRUCTURES; OPTICAL INVESTIGATIONS; WELLS; GROWTH; ZNSE; EPITAXY; LASERS; ENERGY; STRAIN; FILMS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 20 Dec 2022 07:26 |
| Last Modified: | 20 Dec 2022 07:30 |
| URI: | https://pred.uni-regensburg.de/id/eprint/48925 |
Actions (login required)
 |
View Item |
