Thermodynamic balance in quantum dot lasers

H. D. Summers, J. D. Thomson, P. M. Smowton, P. Blood, M. Hopkinson

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

The spontaneous emission and optical gain spectra from an InGaAs quantum dot laser have been independently measured under the same operating conditions. Using these spectra a combined probability-distribution function describing the electron occupancy in the conduction and valence bands has been experimentally determined. Comparison of this function with theoretical curves based on Fermi-Dirac statistics shows that for temperatures down to 100 K the carrier occupancy statistics are accurately described by thermal distributions. Measurements at 70 K show a breakdown of thermodynamic equilibrium indicated by non-thermal carrier distributions.

Original languageEnglish (US)
Pages (from-to)140-143
Number of pages4
JournalSemiconductor Science and Technology
Volume16
Issue number3
DOIs
StatePublished - Mar 1 2001

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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