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Ultrafast red-shift of biexciton binding energy by multiple exciton generation in PbS quantum dots

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Abstract

Using ultrafast pump-probe spectroscopy, we investigate the exciton-exciton interaction in PbS quantum dot, and show that the biexciton binding energy is strongly altered by the extra single-exciton generated by the carrier multiplication process.

© 2013 Optical Society of America

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