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Charged Exciton Linewidth Narrowing via Nuclear Spin Screening in an InAs QD Ensemble

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Abstract

Differential transmission spectroscopy of InAs QDs reveals that the positively charged exciton homogeneous linewidth is broadened by the electron hyperfine interaction. Application of a Faraday magnetic field screens the interaction, narrowing the linewidth by 25%.

© 2015 Optical Society of America

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