Nonlinear absorption and gain in InGaAs/GaAs quantum wells

Nonlinear absorption and gain in InGaAs/GaAs quantum wells

We present a detailed study of the excitonic nonlinearities in InGaAs/GaAs multiple quantum wells based on both stationary and transient pump-and-probe transmission spectroscopy. Bleaching of the excitonic resonance and free carrier gain have been observed. A quantitative analysis of the observed no...

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Veröffentlicht in:Applied physics letters 1997-08, Vol.71 (7), p.915-917
Hauptverfasser: Coli, Giuliano, Passaseo, Adriana, Greco, Donato, Cingolani, Roberto, Tagliaferri, Marco, di Trapani, Paolo, Andreoni, Alessandra
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Sprache:eng
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Zusammenfassung:We present a detailed study of the excitonic nonlinearities in InGaAs/GaAs multiple quantum wells based on both stationary and transient pump-and-probe transmission spectroscopy. Bleaching of the excitonic resonance and free carrier gain have been observed. A quantitative analysis of the observed nonlinearity is provided by means of a rigorous solution of the Bethe–Salpeter equation for the investigated heterostructures.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.119687