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Abstract
This paper introduces picosecond time-resolved antibunching (psTRAB) to measure nanoscale exciton motion and the true number of chromophores in multichromophoric systems. By analyzing photon statistics with pulsed excitation, psTRAB distinguishes between photon antibunching arising from the particle-like nature of light and that resulting from exciton diffusion and annihilation. The method is validated using DNA origami structures with a known number of chromophores and applied to conjugated polymer aggregates, revealing details of exciton diffusion in one, two, and three dimensions.
Publisher
Nature Communications
Published On
Feb 26, 2021
Authors
Gordon J. Hedley, Tim Schröder, Florian Steiner, Theresa Eder, Felix J. Hofmann, Sebastian Bange, Dirk Laux, Sigurd Höger, Philip Tinnefeld, John M. Lupton, Jan Vogelsang
Tags
picosecond time-resolved antibunching
exciton motion
chromophores
photon statistics
DNA origami
conjugated polymer aggregates
exciton diffusion

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