Time-resolved dual wavelength studies of optically induced circular dichroism in multiple quantum wells

Summary form only given.Previous pump-probe studies of n=1 heavy-hole exciton saturation in room temperature GaAs/AlGaAs MQWs using circular polarizations have quantified the relative contributions of phase-space filling (PSF), screening, and broadening, while electron spin gratings have allowed the...

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Published inTechnical Digest. Summaries of Papers Presented at the International Quantum Electronics Conference. Conference Edition. 1998 Technical Digest Series, Vol.7 (IEEE Cat. No.98CH36236) pp. 106 - 107
Main Authors Holden, T.M., Kennedy, G.T., White, S.J., Mazilu, M., Miller, A., Allen, J.F.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1998
Subjects
Electron mobility
Electron optics
Excitons
Filling
Gallium arsenide
Optical polarization
Optical pumping
Optical saturation
Quantum well devices
Temperature
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Summary:Summary form only given.Previous pump-probe studies of n=1 heavy-hole exciton saturation in room temperature GaAs/AlGaAs MQWs using circular polarizations have quantified the relative contributions of phase-space filling (PSF), screening, and broadening, while electron spin gratings have allowed the measurement of in-well electron mobilities. In this work we extend the use of circular polarizations to nondegenerate studies of GaAs/AlGaAs MQWs employing a dual wavelength, self-mode-locked Ti:sapphire laser to examine (a) the PSF contribution when pumping at the light-hole exciton feature, (b) induced circular dichroism in n=2 excitons, and (c) interband relaxation times.
ISBN:9781557525413
1557525412
DOI:10.1109/IQEC.1998.680220