Dynamic band-structure modulation of quantum wells by surface acoustic waves
Abstract
The dynamical modulation of the band structure of GaAs quantum wells by a surface acoustic wave (SAW) is investigated using photoluminescence (PL) spectroscopy. The strain field of the SAW modulates the excitonic transitions, leading to a splitting and to a polarization anisotropy of the excitonic PL lines. The oscillator strength of the split line gives direct information about the spatial distribution of carriers in the potential modulation induced by the SAW.
- Publication:
-
Physical Review B
- Pub Date:
- March 2001
- DOI:
- 10.1103/PhysRevB.63.121307
- Bibcode:
- 2001PhRvB..63l1307S
- Keywords:
-
- 77.65.Dq;
- 77.65.Ly;
- 78.55.Cr;
- Acoustoelectric effects and surface acoustic waves in piezoelectrics;
- Strain-induced piezoelectric fields;
- III-V semiconductors