Superlattice excitons and optical absorption

P. M. Young, H. Ehrenreich, P. M. Hui, N. F. Johnson

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

A formalism based on the superlattice crystal coordinate representation, which is valid for arbitrary well and barrier widths, is developed and applied to the Wannier exciton problem. A simple model for the electron-hole Coulomb interaction within the independent subband approximation permits nonvariational calculation of exciton binding energies, oscillator strengths, and optical absorption of both bound and continuum exciton states. The effects of growth axis directed electric and magnetic fields are emphasized. Numerical results for GaAs/ Ga1-xAlxAs and In1-xGa xAs/GaAs exciton binding energies and oscillator strengths as functions of well width, barrier width, and electric and magnetic field strengths show excellent agreement with experiment.

Original languageEnglish (US)
Pages (from-to)7369-7378
Number of pages10
JournalJournal of Applied Physics
Volume74
Issue number12
DOIs
StatePublished - Dec 1 1993

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Young, P. M., Ehrenreich, H., Hui, P. M., & Johnson, N. F. (1993). Superlattice excitons and optical absorption. Journal of Applied Physics, 74(12), 7369-7378. https://doi.org/10.1063/1.355005