Quantum-dot cascade laser: Proposal for an ultralow-threshold semiconductor laser

Ned S. Wingreen, Charles A. Stafford

Research output: Contribution to journalArticlepeer-review

77 Scopus citations


We propose a quantum-dot version of the quantum-well cascade laser of Faist et al. The elimination of single phonon decays by the three-dimensional confinement implies a several order-of-magnitude reduction in the threshold current. The requirements on dot size (10-20 nm) and on dot density and uniformity [one coupled pair of dots per (200 nm 3) with 5% nonuniformity] are dose to current technology.

Original languageEnglish (US)
Pages (from-to)1170-1173
Number of pages4
JournalIEEE Journal of Quantum Electronics
Issue number7
StatePublished - Jul 1997


  • CW lasers
  • Proposals
  • Quantum-well lasers
  • Semiconductor lasers
  • Submillimeter wave lasers

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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