Abstract
The second-order Raman spectrum of the confined GaAs-like optical phonons in a GaAs-AlAs superlattice is reported. For laser energies in resonance with the first exciton in the GaAs quantum wells, the experiments show a series of sharp peaks that can be attributed to combinations of confined phonons of A1 symmetry. An additional broader peak corresponds to the combination of the GaAs-like and AlAs-like interface vibrational modes previously reported in the first-order spectra. The resonance profile of the overtones and combinations of confined phonons is also presented.
Original language | English (US) |
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Pages (from-to) | 1412-1414 |
Number of pages | 3 |
Journal | Physical Review B |
Volume | 32 |
Issue number | 2 |
DOIs | |
State | Published - 1985 |
Externally published | Yes |
ASJC Scopus subject areas
- Condensed Matter Physics