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- W2034160041 abstract "Oblique-incidence reflectance and photoreflectance of heterostructures near the resonance frequencies of excitons confined in a single quantum well are studied. Under illumination with above barrier band gap light at low temperature, the relative change ΔR/R of the reflectivity is found to reach 10% and even more. The experimental results can be explained by a photo-induced decrease in the exciton damping and attributed to neutralization of the barrier impurity centres under the illumination. Reflexion bei schrägem Einfall und Photoreflexion werden an Heterostrukturen nahe der Resonanzfrequenz von Exzitonen, die in einem einfachen Quantengraben eingeschlossen sind, untersucht. Bei Bestrahlung mit Licht im Bereich oberhalb der Energielücke der Barriere wird bei tiefen Temperaturen eine relative Reflexionsänderung ΔR/R von 10% und mehr gefunden. Die experimentellen Ergebnisse können durch eine photoinduzierte Abnahme der Exzitonendämpfung erklärt und mit einer Neutralisierung der Störstellen innerhalb der Barriere infolge Bestrahlung verknüpft werden." @default.
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- W2034160041 date "1990-09-01" @default.
- W2034160041 modified "2023-09-26" @default.
- W2034160041 title "Reflectivity and Photoreflectivity in Superlattices and Quantum Wells" @default.
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- W2034160041 doi "https://doi.org/10.1002/pssb.2221610121" @default.
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