| DOI | Trouver le DOI : https://doi.org/10.1016/0038-1101(95)00324-X |
|---|
| Auteur | Rechercher : Lockwood, D. J.1; Rechercher : Hawrylak, P.1; Rechercher : Wang, P. D.; Rechercher : Song, Y. P.; Rechercher : Sotomayor Torres, C. M.; Rechercher : Holland, M. C.; Rechercher : Pinczuk, A.; Rechercher : Dennis, B. S. |
|---|
| Affiliation | - Conseil national de recherches du Canada. Institut des sciences des microstructures du CNRC
|
|---|
| Format | Texte, Article |
|---|
| Résumé | Resonant Raman spectroscopy of modulation-doped GaAs/AlGaAs multiple quantum well dots and wires is reported. Deep etching with a SiCl4 reactive ion etching process achieved an excellent aspect ratio (>10:1) and low surface damage for dots and wires of sizes in the range 60-250 nm. A rich spectrum of single particle excitations was observed at Raman shifts in the range 1-35 meV for both dots and wires. Sharp resonances were found for the Raman intensities. The electronic scattering in wires exhibits distinct polarization properties in agreement with theoretical predictions and the spin density excitation energies are in reasonable agreement with Hartree approximation calculations. The dispersion of the intrasubband plasmon collective mode in 60 nm wires has been determined. The excitations in dots show a systematic shift to higher energy with decreasing dot diameter consistent with increased confinement. Magneto-Raman scattering from dot samples was also investigated at magnetic fields up to 12 T and the excitation spectra show level splitting, level crossing and mode softening with increasing magnetic field. |
|---|
| Date de publication | 1996 |
|---|
| Dans | |
|---|
| Langue | anglais |
|---|
| Publications évaluées par des pairs | Oui |
|---|
| Numéro NPARC | 12328006 |
|---|
| Exporter la notice | Exporter en format RIS |
|---|
| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
|---|
| Identificateur de l’enregistrement | 08f992df-bd1f-4acf-8dd4-cb864991cd22 |
|---|
| Enregistrement créé | 2009-09-10 |
|---|
| Enregistrement modifié | 2020-03-20 |
|---|
