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

✍ Scribed by Ken-ichi Hino

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
136 KB
Volume
128
Category
Article
ISSN
0038-1098

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✦ Synopsis

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.

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