Many-body effects on the linewidth enhancement factor in quantum well lasers

Weng W. Chow, Stephan W. Koch, Murray Sargent, Claudia Ell

Research output: Contribution to journalArticle

17 Scopus citations


A many-body theory that includes band-gap renormalization, plasma screening, and interband Coulomb effects is used to calculate the linewidth enhancement factor α in quantum well lasers. We find significant variations in α with carrier density, suggesting that improvements in the laser linewidth and reduction in filamentation effects are possible for some laser configurations.

Original languageEnglish (US)
Pages (from-to)328-330
Number of pages3
JournalApplied Physics Letters
Issue number4
StatePublished - Dec 1 1991


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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