Optical nonlinearities in strained-layer InGaAs/GaAs multiple quantum wells

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JIN, R., OKADA, K., KHITROVA, G., GIBBS, H. M., PEREIRA, Mauro, KOCH, S. W. and PEYGHAMBARIAN, N. (1992). Optical nonlinearities in strained-layer InGaAs/GaAs multiple quantum wells. Applied Physics Letters, 61 (15), p. 1745. [Article]

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Abstract

Optical nonlinearities in strained‐layer InGaAs/GaAs multiple quantum wells (MQWs) are studied using pump‐probe spectroscopy. It is found that the carrier density required for absorption saturation in a strained InGaAs/GaAs MQW is about a factor of two lower than that in an unstrained GaAs/AlGaAs MQW with similar structures, while the nonlinear index change per carrier is about the same for both samples. The decrease in the saturation density in the strained MQW is explained by the increase of the top valence‐band curvature caused by the compressive strain in the quantum well.

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Official URL:

http://dx.doi.org/10.1063/1.108414

Research Institute, Centre or Group - Does NOT include content added after October 2018:

Materials and Engineering Research Institute > Advanced Coatings and Composites Research Centre > Electronic Materials and Sensors Research Group

Page Range:

p. 1745

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Identification Number:

10.1063/1.108414

ORCID for Mauro Pereira: