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Donatas Zigmantas. Portrait.

Donatas Zigmantas

Professor

Donatas Zigmantas. Portrait.

Distinctive character of electronic and vibrational coherences in disordered molecular aggregates

Author

  • Vytautas Butkus
  • Donatas Zigmantas
  • Darius Abramavicius
  • Leonas Valkunas

Summary, in English

Coherent dynamics of coupled molecules are effectively characterized by the two-dimensional electronic spectroscopy. Depending on the coupling between electronic and vibrational states, oscillating signals of purely electronic, purely vibrational or mixed character are observed with the help of oscillation maps, constructed from time-resolved spectra. Amplitude of beatings caused by electronic coherences is heavily affected by energetic disorder and consequently electronic coherences are quickly dephased. Beatings with vibrational character weakly depend on the disorder, ensuring their long-time survival. We show that detailed modeling of two-dimensional spectroscopy signals of molecular aggregates provides direct information on the origin of the coherent beatings. (C) 2013 Elsevier B. V. All rights reserved.

Department/s

  • Chemical Physics
  • NanoLund: Centre for Nanoscience

Publishing year

2013

Language

English

Pages

93-98

Publication/Series

Chemical Physics Letters

Volume

587

Document type

Journal article

Publisher

Elsevier

Topic

  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0009-2614