Anomalous electric-field dependence of excitonic Fano-resonance spectra in semiconductor quantum-wells

Optical absorption spectra due to Fano resonance (FR) of an exciton in a quantum well with an external electric field perpendicular to the layer plane are presented, based on multi-channel scattering calculations incorporating a hole-subband mixing effect. Peak values of the calculated FR spectra ex...

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Bibliographic Details
Published inSolid state communications Vol. 128; no. 1; pp. 9 - 13
Main Author Hino, Ken-ichi
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 01.10.2003
Elsevier
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Summary:Optical absorption spectra due to Fano resonance (FR) of an exciton in a quantum well with an external electric field perpendicular to the layer plane are presented, based on multi-channel scattering calculations incorporating a hole-subband mixing effect. Peak values of the calculated FR spectra exhibit anomalous field-dependent changes. These cannot be accounted for by the commonly-known quantum-confined Stark effect (QCSE) that has been applied exclusively to bound state spectra. This behavior, ascribable to correlation between Fano couplings and the QCSE, is revealed just in high-resolution spectra, otherwise the field-dependence results in nothing but the same as that of the bound-state spectra.
ISSN:0038-1098
1879-2766
DOI:10.1016/S0038-1098(03)00622-7