Femtosecond optical absorption measurements of electron-phonon scattering in GaAs quantum wells

Journal article

The results of a combined experimental and theoretical analysis of time-resolved optical absorption in a GaAs quantum well which allowed for the first time a detailed test of the theoretically predicted scattering rates were presented. The results provided a strong verification of the electron-optical phonon scattering rates in quantum well structures predicted by dielectric continuum theory. Intrasubband rates were determined to be intermediate between those of the bulk constituent materials, GaAs and AlAs. The n=2 population quantified were consistent with that measured by time-resolved Raman spectroscopy. Thus, it can be deduced that the intersubband rate depended weakly on subband separation in a broad range of quantum well width.

Authors: Turner, K; Rota, L; Taylor, R; Ryan, J; Foxon, C

• Journal: Applied Physics Letters
• Volume: 66
• Issue: 23
• Pages: 3188-3190
• Publication date: 1995-06-05
• DOI: 10.1063/1.113718
• ISSN: 0003-6951
• Language: English