| Issue |
EPJ Web of Conferences
Volume 41, 2013
XVIIIth International Conference on Ultrafast Phenomena
|
|
|---|---|---|
| Article Number | 08004 | |
| Number of page(s) | 3 | |
| Section | Molecular Light Harvesting and Charge-Transfer Complexes | |
| DOI | https://doi.org/10.1051/epjconf/20134108004 | |
| Published online | 13 March 2013 | |
https://doi.org/10.1051/epjconf/20134108004
Electronic and Vibrational Coherences in Algal Light-Harvesting Proteins
Department of Chemistry and Centre for Quantum Information and Quantum Control, University of Toronto, Toronto ON M5S 3H6, Canada
We present broadband two-dimensional electronic spectra of a lightharvesting protein from photosynthetic algae. Analysis of the spectra show that the amplitude of the main cross peak oscillates as a function of the waiting time period. Both electronic coupling and intramolecular vibrational modes, and their mixture, can lead to such oscillations. Using predictions based on models of four-level systems, we describe ways to distinguish electronic from vibrational contributions to the coherence and find that both types of coupling contribute to the measured dynamics.
© Owned by the authors, published by EDP Sciences, 2013
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