Many-body effects on bandgap shrinkage, effective masses and alpha factor

Jian Zhong Li, Cun-Zheng Ning

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


Many-body Coulomb effects influence the operation of quantum-well (QW) laser diode (LD) strongly. In the present work, we study a two-band electron-hole plasma (EHP) within the Hatree-Fock approximation and the single plasmon pole approximation for static screening. Full inclusion of momentum dependence in the many-body effects is considered. An empirical expression for carrier density dependence of the bandgap renormalization (BGR) in an 8 nm GaAs/Al 0.3Ga 0.7As single QW will be given, which demonstrates a non-universal scaling behavior for quasi-two-dimension structures, due to size-dependent efficiency of screening. In addition, effective mass renormalization (EMR) due to momentum-dependent self-energy many-body correction, for both electrons and holes, is studied and serves as another manifestation of the many-body effects. Finally, the effects on carrier density dependence of the alpha factor is evaluated to assess the sensitivity of the full inclusion of momentum dependence.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
StatePublished - 2000
Externally publishedYes
EventPhysics and Simulation of Optoelectronic Devices VIII - San Jose, CA, USA
Duration: Jan 24 2000Jan 28 2000


OtherPhysics and Simulation of Optoelectronic Devices VIII
CitySan Jose, CA, USA

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics


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