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  Superradiance from Two Dimensional Brick-Wall Aggregates of Dye Molecules: The Role of Size and Shape for the Temperature Dependence

Eisfeld, A., Marquardt, C., Paulheim, A., & Sokolowski, M. (2017). Superradiance from Two Dimensional Brick-Wall Aggregates of Dye Molecules: The Role of Size and Shape for the Temperature Dependence. Physical Review Letters, 119(9): 097402. doi:10.1103/PhysRevLett.119.097402.

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 Urheber:
Eisfeld, Alexander1, Autor           
Marquardt, Christian2, Autor
Paulheim, Alexander2, Autor
Sokolowski, Moritz2, Autor
Affiliations:
1Max Planck Institute for the Physics of Complex Systems, Max Planck Society, ou_2117288              
2external, ou_persistent22              

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 MPIPKS: Light-matter interaction
 Zusammenfassung: Aggregates of interacting molecules can exhibit electronically excited states that are coherently delocalized over many molecules. This can lead to a strong enhancement of the fluorescence decay rate which is referred to as superradiance (SR). To date, the temperature dependence of SR is described by a 1/T law. Using an epitaxial dye layer and a Frenkel-exciton based model we provide both experimental and theoretical evidence that significant deviations from the 1/T behavior can occur for brick-wall-type aggregates of finite size leading even to a maximum of the SR at finite temperature. This is due to the presence of low energy excitations of weak or zero transition strength. These findings are relevant for designing light-emitting molecular materials.

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Sprache(n): eng - English
 Datum: 2017-08-312017-09-01
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Art der Begutachtung: -
 Identifikatoren: ISI: 000408705200023
DOI: 10.1103/PhysRevLett.119.097402
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Titel: Physical Review Letters
  Kurztitel : Phys. Rev. Lett.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Woodbury, N.Y. : American Physical Society
Seiten: - Band / Heft: 119 (9) Artikelnummer: 097402 Start- / Endseite: - Identifikator: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1