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The Initial Pump-Probe Polarization Anisotropy of Colloidal PbS Quantum Dots

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Abstract

Pump-probe polarization anisotropy measurements with 15 fs pulses are employed to investigate the electronic structure of PbS quantum dots. The initial anisotropy at the bandgap is anomalously low (<0.1) and suggests large electronic couplings.

© 2016 Optical Society of America

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