Single Lévy states-disorder induced energy funnels in molecular aggregates.
basic_science · Level V
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- Record sourced from PubMed, PMID 25349900.
- Also identified by DOI 10.1021/nl5021188.
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Abstract
Using fluorescence super-resolution microscopy we studied simultaneous spectral, spatial localization, and blinking behavior of individual 1D J-aggregates. Excitons migrating 100 nm are funneled to a trap appearing as an additional red-shifted blinking fluorescence band. We propose that the trap is a Frenkel exciton state formed much below the main exciton band edge due to an environmentally induced heavy-tailed Lévy disorder. This points to disorder engineering as a new avenue in controlling light-harvesting in molecular ensembles.