Saturation of intersubband transitions in p -doped GaAsAlGaAs quantum wells

Robert Steed, Mary Matthews, Jonathan Plumridge, Mark Frogley, Chris Phillips, Zoran Ikonic, Paul Harrison, Oana Malis, Loren N. Pfeiffer, Kenneth W. West

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Optical saturation experiments have been performed on hh1-hh2 intersubband transitions in two samples of p -doped GaAsAlGaAs quantum wells. The transitions had energies of 183 and 160 meV and the measured population relaxation times were 2±1.5 and 0.3±0.1 ps, respectively. Modeling of the quantum wells with a 6×6 kp method shows that intersubband scattering by LO phonons can account for these relaxation times. The valence bandstructure is typically more complicated than the conduction bandstructure in a quantum well but these measurements show that LO phonons are the dominant intersubband scattering mechanism in both cases.

Original languageEnglish (US)
Article number183104
JournalApplied Physics Letters
Issue number18
StatePublished - 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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