Abstract
The population relaxation time of nonequilibrium LO phonons with wave vectors perpendicular to the layers of GaAs-AlxGa1-xAs multiple-quantum-well structures is measured by time-resolved Raman scattering on a picosecond time scale. The experimental results have revealed the generation as well as decay of these excitations, and 6 ps is deduced for their relaxation time at T80 K. From the estimated rise time of the anti-Stokes signal, an upper limit (-0.8 ps) for the average electron-phonon scattering time for electrons occupying the continuum states is determined.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 4412-4414 |
| Number of pages | 3 |
| Journal | Physical Review B |
| Volume | 34 |
| Issue number | 6 |
| DOIs | |
| State | Published - 1986 |
ASJC Scopus subject areas
- Condensed Matter Physics