Thermodynamic balance in quantum dot lasers

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

Research output: Contribution to journalArticle

54 Scopus citations


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
Issue number3
StatePublished - Mar 1 2001

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Thermodynamic balance in quantum dot lasers'. Together they form a unique fingerprint.

Cite this