Microscopic modeling of intersubband resonances in InAs/AlSb quantum wells

J. Li, K. I. Kolokolov, C. Z. Ning, D. C. Larrabee, G. A. Khodaparast, J. Kono, K. Ueda, Y. Nakajima, S. Sasa, M. Inoue

Research output: Contribution to journalConference articlepeer-review

4 Scopus citations


Linear absorption spectra from intersubband resonance in InAs/AlSb quantum wells are analyzed theoretically using the intersubband semiconductor Bloch equation approach. Our model goes beyond the Hartree-Fock approximation and treats particle-particle correlations under the second Born approximation. Electron-electron and longitudinal optical phonon scatterings from such a treatment describe intrinsic line broadening to the intersubband resonance. Electron subbands are determined self-consistently with a spurious-state-free 8-band k·p Hamiltonian under the envelope function approximation. To compare with experimental measurements, we also included line broadening due to electron-interface roughness scattering. Excellent agreement was achieved for temperature-dependent absorption spectra in the mid-infrared frequency range, after taking into careful account the interplay of material parameters, nonparabolicity in bandstructure, and many-body effects.

Original languageEnglish (US)
Pages (from-to)268-271
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number3-4
StatePublished - Jan 2004
Externally publishedYes
EventProceedings of the 11th International Conference on Narrow Gap - Buffalo, NY., United States
Duration: Jun 16 2003Jun 20 2003


  • InAs/AlSb
  • Intersubband resonance
  • Many-body effects
  • Quantum wells

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


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