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

Jianzhong Li; Cun-Zheng Ning

doi:10.1117/12.391434

14 July 2000 Many-body effects on bandgap shrinkage, effective masses, and alpha factor

Jianzhong Li, Cun-Zheng Ning

Proceedings Volume 3944, Physics and Simulation of Optoelectronic Devices VIII; (2000) https://doi.org/10.1117/12.391434
Event: Symposium on Integrated Optoelectronics, 2000, San Jose, CA, United States

Abstract

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.

Citation Download Citation

Jianzhong Li and Cun-Zheng Ning "Many-body effects on bandgap shrinkage, effective masses, and alpha factor", Proc. SPIE 3944, Physics and Simulation of Optoelectronic Devices VIII, (14 July 2000); https://doi.org/10.1117/12.391434

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