Goeger, G. and Betz, M. and Leitenstorfer, A. and Bichler, M. and Wegscheider, Werner and Abstreiter, G. (2000) Ultrafast optical spectroscopy of large-momentum excitons in GaAs. PHYSICAL REVIEW LETTERS, 84 (25). pp. 5812-5815. ISSN 0031-9007
Full text not available from this repository.Abstract
Highly energetic excitons with wave vectors much larger than that of an absorbed photon are excited in thin GaAs films. We observe propagation beats between three polariton modes up to 300 meV above the absorption edge employing femtosecond transmission spectroscopy. The dispersion relations of the coherent excitations are measured. Ultrafast exciton damping via scattering with nonequilibrium carriers and with phonons is investigated. The dynamics is found to deviate strongly from the relaxation of free carriers. Theoretical simulations are in quantitative agreement with the data.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | QUANTUM WELLS; POLARITON; QUANTIZATION; INTERFERENCE; CRYSTALS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Werner Wegscheider |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 05 Apr 2022 13:02 |
| Last Modified: | 05 Apr 2022 13:02 |
| URI: | https://pred.uni-regensburg.de/id/eprint/42400 |
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