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Role of intramolecular dynamics on intermolecular coupling in cyanine dye (Articolo in rivista)

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Role of intramolecular dynamics on intermolecular coupling in cyanine dye (Articolo in rivista) (literal)

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Alternative label

Virgili T. (3); Cerullo, G. (1); Stagira, S. (1); Lanzani, G. (5); Lüer, L. (1); Coles, D. (2); Lidzey, D. G. (2); Meijer, A. J H M (4) (2010)
Role of intramolecular dynamics on intermolecular coupling in cyanine dye
in Physical review. B, Condensed matter and materials physics
(literal)

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Virgili T. (3); Cerullo, G. (1); Stagira, S. (1); Lanzani, G. (5); Lüer, L. (1); Coles, D. (2); Lidzey, D. G. (2); Meijer, A. J H M (4) (literal)

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(1) ULTRAS-INFM-CNR - Dipartimento di Fisica; (2) Department of Physics and Astronomy - University of Sheffield; (3) Istituto di Fotonica e Nanotecnologie-CNR - ; (4) Department of Chemistry - University of Sheffield; (5) CNST - IIT at POLIMI (literal)

Titolo

Role of intramolecular dynamics on intermolecular coupling in cyanine dye (literal)

Abstract

Using pump-probe spectroscopy with sub-10-fs time resolution, we have studied coherent vibrational dynamics in a cyanine dye, in both monomeric and J -aggregate form. We show that coherent excitation of a particular intramolecular vibrational mode can result in a periodic modulation of the intermolecular excitonic coupling within the aggregate. This effect is manifested by a pronounced time-dependent modulation of the electronic transition energy of the aggregate. Such process may have direct importance in a range of electronic processes in supramolecular assemblies. © 2010 The American Physical Society. (literal)

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