An ab initio based approach to optical properties of semiconductor heterostructures

L. C. Bannow, P. Rosenow, P. Springer, E. W. Fischer, Jorg Hader, Jerome V Moloney, R. Tonner, Stephan W Koch

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

A procedure is presented that combines density functional theory computations of bulk semiconductor alloys with the semiconductor Bloch equations, in order to achieve an ab initio based prediction of the optical properties of semiconductor alloy heterostructures. The parameters of an eight-band -Hamiltonian are fitted to the effective band structure of an appropriate alloy. The envelope function approach is applied to model the quantum well (QW) using the -wave functions and eigenvalues as starting point for calculating the optical properties of the heterostructure. It is shown that Luttinger parameters derived from band structures computed with the TB09 density functional reproduce extrapolated values. The procedure is illustrated by computing the absorption spectra for a (AlGa)As/Ga(AsP)/(AlGa)As QW system with varying phosphide content in the active layer.

Original languageEnglish (US)
Article number065001
JournalModelling and Simulation in Materials Science and Engineering
Volume25
Issue number6
DOIs
StatePublished - Jun 7 2017

Keywords

  • absorption
  • density functional theory
  • k • p-theory
  • semiconductor Bloch equations
  • Semiconductors

ASJC Scopus subject areas

  • Modeling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Computer Science Applications

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