Mid-infrared hole-intersubband electroluminescence in carbon-doped GaAs/AlGaAs quantum cascade structures

Oana Malis, Loren N. Pfeiffer, Kenneth W. West, A. Michael Sergent, Claire F. Gmachl

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Mid-infrared electroluminescence from carbon-doped GaAsAlGaAs quantum cascade structures was observed and studied to determine the prospects of hole intersubband transitions for possible use in light emitting devices. The luminescence spectra exhibit a complex three-peak structure consistent with two heavy-to-heavy hole transitions and thermal emission. The hole transition energies in emission are in agreement with corresponding absorption and photocurrent energies, but typically 17% smaller than expected from calculations of a six-band k·p model. The upper-level lifetime was estimated to be 0.4 ps, in agreement with simple calculations considering approximations of the heavy-hole effective masses.

Original languageEnglish (US)
Article number081117
JournalApplied Physics Letters
Issue number8
StatePublished - 2006

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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