Absorption Saturation of Intersubband Transition in InGaAs/AlAsSb Quantum Well Characterized by Absorption Spectral Analysis
- 1 October 2001
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 40 (10A) , L1015-1018
- https://doi.org/10.1143/jjap.40.l1015
Abstract
A lineshape analysis is carried out to deduce the homogeneous linewidth from temperature dependent absorption spectra on the intersubband transitions in InGaAs/AlAsSb quantum wells. Using this linewidth and the pump-probe relaxation time (≈ 2.1 ps) at room temperature, we estimate the saturation intensity to be 52±5 MW/cm2 which shows an agreement with the value obtained from a saturation measurement using a femtosecond laser.Keywords
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