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Proceedings Paper

Magneto-optical studies of highly excited quantum wells (Invited Paper)
Author(s): Vladimir D. Kulakovskii
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Paper Abstract

High excitation luminescence spectra from a homogeneous electron-hole system have been investigated in undoped strained InxGa1-xAs/GaAs and unstrained InxGa1-xAs/InP quantum wells in magnetic fields up to 12 T. Clear excitonic effects are observed in the optical spectra of neutral, dense magnetoplasmas in the In0.53Ga0.47As/InP quantum well at low temperatures. A direct evidence that electrons and holes from the N-th Landau levels bind into magnetoexcitons is the suppression of the density dependence of transition energies between the uppermost occupied (je equals jh equals N) Landau levels in the range of filling factors N < (nu) /2 < N + 1. The effect disappears with increasing temperature. Good agreement between experimental results and theoretical calculations is achieved by including both the inter-Landau-level coupling and screening effects. For the dense (n > 1012 cm-2) magnetoplasma with electron temperature of the order of the cyclotron energy, the Landau level splitting is described within the framework of a simple plasma approximation. The renormalization of the reduced effective mass has been carefully measured.

Paper Details

Date Published: 1 July 1992
PDF: 13 pages
Proc. SPIE 1678, Spectroscopic Characterization Techniques for Semiconductor Technology IV, (1 July 1992); doi: 10.1117/12.60465
Show Author Affiliations
Vladimir D. Kulakovskii, Institute of Solid State Physics (Russia)


Published in SPIE Proceedings Vol. 1678:
Spectroscopic Characterization Techniques for Semiconductor Technology IV

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