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Two-colour infrared absorption in InAs/GaSb-based type II and broken-gap quantum well systems

Journal Article


Abstract


  • We examine theoretically the contribution from different transition channels to optical absorption in an InAs/GaSb-based type II and

    broken-gap quantum well in which both electron and hole subbands in different layers are occupied by carriers. We find that in such a

    system, due to a weak overlap of the electron and hole wavefunction at the interface, optical absorption is mainly achieved via intersubband

    transition within the same material layer. As a result, two sharp absorption peaks can be observed and the intensity of this

    two-colour absorption depends rather weakly on temperature up to room-temperature.

UOW Authors


  •   Wei, X F. (external author)
  •   Xu, Wen (external author)
  •   Zhang, Jun (external author)
  •   Zeng, Zhi (external author)
  •   Zhang, C

Publication Date


  • 2008

Citation


  • Wei, X. F., Xu, W., Zhang, J., Zeng, Z. & Zhang, C. (2008). Two-colour infrared absorption in InAs/GaSb-based type II and broken-gap quantum well systems. Physica E: Low-Dimensional Systems and Nanostructures, 40 1069-1071.

Scopus Eid


  • 2-s2.0-39649114578

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/3571

Number Of Pages


  • 2

Start Page


  • 1069

End Page


  • 1071

Volume


  • 40

Abstract


  • We examine theoretically the contribution from different transition channels to optical absorption in an InAs/GaSb-based type II and

    broken-gap quantum well in which both electron and hole subbands in different layers are occupied by carriers. We find that in such a

    system, due to a weak overlap of the electron and hole wavefunction at the interface, optical absorption is mainly achieved via intersubband

    transition within the same material layer. As a result, two sharp absorption peaks can be observed and the intensity of this

    two-colour absorption depends rather weakly on temperature up to room-temperature.

UOW Authors


  •   Wei, X F. (external author)
  •   Xu, Wen (external author)
  •   Zhang, Jun (external author)
  •   Zeng, Zhi (external author)
  •   Zhang, C

Publication Date


  • 2008

Citation


  • Wei, X. F., Xu, W., Zhang, J., Zeng, Z. & Zhang, C. (2008). Two-colour infrared absorption in InAs/GaSb-based type II and broken-gap quantum well systems. Physica E: Low-Dimensional Systems and Nanostructures, 40 1069-1071.

Scopus Eid


  • 2-s2.0-39649114578

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/3571

Number Of Pages


  • 2

Start Page


  • 1069

End Page


  • 1071

Volume


  • 40