Mv. Marquezini et al., DENSITY-DEPENDENCE OF THE SPECTRAL DIELECTRIC FUNCTION ACROSS A FANO RESONANCE, Physical review. B, Condensed matter, 57(7), 1998, pp. 3745-3748
We study the effects of photocarrier density on a magnetically induced
Fano resonance in GaAs, using a combined phase-amplitude transmission
spectroscopy technique. By comparing our results to an extension of t
he Fano model we measure the relative contributions of two, usually un
distinguished, effects of the photocarriers: the screening of the inte
r-Landau-level Coulomb coupling, and the induced collisional broadenin
g of the coupled discrete-state/continuum natural linewidth. [S0163-18
29(95)07004-0].