Spectroscopists and theorists are closing in on an understanding of the origin of oscillatory features in the spectral response of light-harvesting complexes to femtosecond pulsed excitation. Now, the photosynthetic Fenna–Matthews–Olson complex is probed by femtosecond pump–probe spectroscopy and compared with a series of genetically modified mutants with distinct excitonic interactions, allowing electronic and vibrational contributions to coherence to be distinguished.
- Margherita Maiuri
- Evgeny E. Ostroumov
- Gregory D. Scholes
