Optical Fermi-edge singularities in a one-dimensional electron system with tunable effective mass

J. M. Calleja, A. R. Goñi, A. Pinczuk, B. S. Dennis, J. S. Weiner, L. N. Pfeiffer, K. W. West

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

We have investigated the dependence on the magnetic field of the optical absorption and emission of a one-dimensional (1D) electron gas in GaAs quantum wires with one occupied subband. Spectra show a strong Fermi-edge singularity that narrows as the Fermi energy in the wires is continuously reduced by the enhancement of the effective mass in a perpendicular magnetic field. At high fields, when the cyclotron energy is larger than the 1D subband spacing, the lowest optical transition splits into a doublet due to the spatial modulation of the Landau levels by the wire potential.

Original languageEnglish (US)
Pages (from-to)4285-4288
Number of pages4
JournalPhysical Review B
Volume51
Issue number7
DOIs
StatePublished - 1995
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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