Linear and nonlinear optical properties of semiconductor nanorings with magnetic field and disorder - Influence on excitons and biexcitons

T. Meier, P. Thomas, S. W. Koch

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Linear and nonlinear optical absorption spectra are studied theoretically for semiconductor nanorings penetrated by a magnetic field. Due to the Aharanov-Bohm effect the spectral position as well as the oscillator strength of the exciton change periodically as function of the magnetic flux enclosed by the ring. In the nonlinear differential absorption spectra it is found that the magnetic field strongly modifies Coulomb many-body correlations. In particular, the magnetic-field-induced increase of the exciton binding energy is accompanied by a decrease of the biexciton binding energy. The persistence of these effects in the presence of energetic disorder is analyzed.

Original languageEnglish (US)
Pages (from-to)249-256
Number of pages8
JournalEuropean Physical Journal B
Volume22
Issue number2
DOIs
StatePublished - Jul 2 2001

Keywords

  • 71.35.Cc Intrinsic properties of excitons; optical absorption spectra
  • 78.66.-w Optical properties of specific thin films

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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