Effects of strain and Coulomb interaction on gain and refractive index in quantum-well lasers

M. F. Pereira, Stephan W Koch, W. W. Chow

Research output: Contribution to journalArticle

39 Scopus citations


The eigenstates of the coupled-band Luttinger Hamiltonian are used to derive modified optical Bloch equations for strained layer semiconductor heterostructures. An average effective-mass approximation is introduced, and the single-plasmon-pole approximation for the screened Coulomb interaction is extended for the multiplesubband case. Spectra of the optical absorption/gain and of the antiguiding (linewidth enhancement) factor are computed by use of a high-density Padg approximation for the quantum-well susceptibility. We compare results for various strained and unstrained systems.

Original languageEnglish (US)
Pages (from-to)765-773
Number of pages9
JournalJournal of the Optical Society of America B: Optical Physics
Issue number5
StatePublished - 1993


ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics

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