Coherent Exciton Delocalization in Strongly Coupled Quantum Dot Arrays

Crisp R, Schrauben JN, Beard MC, Luther JM, Johnson JC (2013)

Publication Status: Published

Publication Type: Journal article

Publication year: 2013

Journal

Nano Letters American Chemical Society

Publisher: AMER CHEMICAL SOC

Book Volume: 13

Pages Range: 4862-4869

Journal Issue: 10

DOI: 10.1021/nl402725m

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.

Authors with CRIS profile

Ryan Crisp Lehrstuhl für Chemistry of thin film materials

Involved external institutions

National Renewable Energy Laboratory (NREL)

United States (USA) (US)

How to cite

APA:

Crisp, R., Schrauben, J.N., Beard, M.C., Luther, J.M., & Johnson, J.C. (2013). Coherent Exciton Delocalization in Strongly Coupled Quantum Dot Arrays. Nano Letters, 13(10), 4862-4869. https://dx.doi.org/10.1021/nl402725m

MLA:

Crisp, Ryan, et al. "Coherent Exciton Delocalization in Strongly Coupled Quantum Dot Arrays." Nano Letters 13.10 (2013): 4862-4869.

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