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Applied Physics Letters

Nonlinear absorption and gain in InGaAs/GaAs quantum wells

Giuliano Coli, A. Passaseo, Donato Greco, R. Cingolani, Marco Tagliaferri, P. Di Trapani, Alessandra Andreoni

Published Aug 18, 1997• 1 citation
Publisher

Abstract

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.

DOI
10.1063/1.119687

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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.
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