Papers & References

Coherent exciton delocalization in strongly coupled quantum dot arrays

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Authors: Crisp, Ryan W.; Schrauben, Joel N.; Beard, Matthew C.; Luther, Joseph M. & Johnson, Justin C.
Abstract:

“Quantum dots (QDs) coupled into disordered arrays have exhibited the intriguing property of bulk-like transport while maintaining discrete excitonic optical transitions. We have utilized ultrafast cross-polarized transient grating (CPTG) spectroscopy to measure electron–hole wave function overlap in CdSe QD films with chemically modified surfaces for tuning inter-QD electronic coupling. By comparing the CPTG decays with those of isolated QDs, we find that excitons coherently delocalize to form excited states more than 200% larger than the QD diameter.”

Restricted Access

Publication: Nano letters
Issue/Year: Nano letters, Volume 13; Number 10; Pages 4862–4869; 2013
DOI: 10.1021/nl402725m
Link: https://doi.org/10.1021/nl402725m
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