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InAsSb/InGaAs multiple-quantum-well heterostructure design for improved 4-5 μm lasers

Applied Physics Letters, ISSN: 0003-6951, Vol: 64, Issue: 24, Page: 3219-3221
1994
  • 11
    Citations
  • 0
    Usage
  • 1
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    11
    • Citation Indexes
      11
  • Captures
    1

Article Description

A new strained-layer multiple-quantum-well (MQW) heterostructure comprising InAsSb wells and InGaAs barrier layers is proposed for improved 4-5 μm lasers. Both well and barrier compositions are close to InAs and are potentially well suited for high-quality crystal growth of MQWs on either InAs or GaSb substrates. Simple modeling shows favorable valence-band alignment suitable for carrier confinement, free of the staggered band alignment problem generally found in the conventional designs. Perturbation calculation of the effect of the compressive strain in the wells also shows sufficient valence subband separation. This and the reduced hole mass are expected to considerably lower the threshold carrier density and Auger recombination.

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