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Proceedings Paper

Many body interactions and dynamic shift of the absorption resonance wavelength in all-optical polarization switching of InGaAs(P) MQWs
Author(s): Tao Wang; An Li; Zheyuan Tan
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Paper Abstract

Exciton saturation and optical nonlinearities in multiple quantum wells due to many body interactions consisting of phase-space filling and Coulomb screening are investigated. We have made a theoretical model to compare the different effects induced by the two many-body interactions. We focus our calculations on the shift of the exciton absorption resonance at highly excited carrier densities in MQW which can be obtained through femtosecond pump-probe technique. We find that the blue shift of the exciton absorption resonance wavelength caused by the phase-space filling effects is about equivalent to the red shift of Coulomb screening effects in same circular polarization, while in contrary the red shift is much lager than the blue shift in opposite circular polarization. This phenomenon happens within optical switching timescale.

Paper Details

Date Published: 8 January 2008
PDF: 10 pages
Proc. SPIE 6838, Optoelectronic Devices and Integration II, 683814 (8 January 2008); doi: 10.1117/12.755712
Show Author Affiliations
Tao Wang, Huazhong Univ. of Science and Technology (China)
An Li, Huazhong Univ. of Science and Technology (China)
Zheyuan Tan, Huazhong Univ. of Science and Technology (China)

Published in SPIE Proceedings Vol. 6838:
Optoelectronic Devices and Integration II
Xuping Zhang; Hai Ming; Maggie Yihong Chen, Editor(s)

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