Abstract
The effect of vertical electric fields on the neutral exciton of GaAs "natural" quantum dots is investigated. A Stark effect with a quadratic field dependence up to 2 meV was observed and reveals a displacement of the excitonic wave function. The luminescencequenching limits the applied electric field range. No significative change on the fine structure splitting of the neutral exciton has been observed, suggesting that the lateral potential induced by the vertical electric field is too weak to modify the in-plane anisotropy of the exciton wave function.
| Original language | English |
|---|---|
| Pages (from-to) | 2069-2071 |
| Number of pages | 3 |
| Journal | Physica E: Low-Dimensional Systems and Nanostructures |
| Volume | 40 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2008 Apr |
Keywords
- Fine structure splitting
- GaAs
- Quantum dots
- Spectroscopy
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics