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

doi:10.1063/1.2920706

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 journal › Article › peer-review

10 Citations (Scopus)

Abstract

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 language	English
Article number	183104
Journal	Applied Physics Letters
Volume	92
Issue number	18
DOIs	https://doi.org/10.1063/1.2920706
Publication status	Published - 5 May 2008
Externally published	Yes

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title = "Saturation of intersubband transitions in p -doped GaAsAlGaAs quantum wells",

abstract = "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.",

keywords = "Conduction bands, Molecular orbitals, Relaxation time, Semiconducting gallium compounds, Valence bands",

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

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T1 - Saturation of intersubband transitions in p -doped GaAsAlGaAs quantum wells

AU - Steed, Robert

AU - Matthews, Mary

AU - Plumridge, Jonathan

AU - Frogley, Mark

AU - Phillips, Chris

AU - Ikonic, Zoran

AU - Harrison, Paul

AU - Malis, Oana

AU - Pfeiffer, Loren N.

AU - West, Kenneth W.

N1 - Funding Information: The support of the UK Engineering and Physical Sciences Research Council is gratefully acknowledged.

PY - 2008/5/5

Y1 - 2008/5/5

N2 - 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.

AB - 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.

KW - Conduction bands

KW - Molecular orbitals

KW - Relaxation time

KW - Semiconducting gallium compounds

KW - Valence bands

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DO - 10.1063/1.2920706

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ER -

Saturation of intersubband transitions in p -doped GaAsAlGaAs quantum wells

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