Cited by 18Spectroscopy and Quantum Chemical StudiesPhotochemistry and Electron Transfer StudiesPhotosynthetic Processes and Mechanisms

Excited state coherent dynamics in light-harvesting complexes from photosynthetic marine algae

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Richards, G H, Wilk, K E, Curmi, P M G, Quiney, H M, Davis, J A·2012·Journal of Physics B: Atomic, Molecular and Optical Physics

Abstract

We explore coherence dynamics in light-harvesting complexes and their interactions with other electronic states and vibrational modes. This is achieved by utilizing a two-colour four-wave mixing spectroscopy to excite and analyse a specific coherence pathway in the phycocyanin-645 (PC645) light-harvesting complex. We observe the dephasing rate increase as a function of temperature and oscillations in the signal intensity as a function of waiting time which reveals coherent excitation of pathways not directly resonant with the laser pulses. This coherent excitation of non-resonant electronic states implies strong coupling to phonon modes, which is necessary if coherent energy transfer between non-resonant states is to play any role in photosynthetic energy transfer.

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  • There is compelling theoretical and/or experimental evidence that quantum phenomena are essential for understanding the mechanism underlying olfaction.

    “environment assisted excitation energy transport in photosynthesis [11, 15, 16], magneto-reception of birds [17-19] and the mechanism underlying olfaction [20, 21], for which there is some compelling theoretical and/or experimental evidence that quantum phenomena are essential for their understanding.”

    From Vibrations, quanta and biology (2013) · cites this paper as [21]

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Authors
Richards, G. H., Wilk, K. E., Curmi, P. M. G., Quiney, H. M., & Davis, J. A.
Affiliations
  • Swinburne University of Technology (AU)
  • UNSW Sydney (AU)
  • The University of Melbourne (AU)
  • ARC Centre of Excellence for Coherent X-ray Science (AU)
Corresponding author
Davis, J A
Venue
Journal of Physics B: Atomic, Molecular and Optical Physics
Published
2012-07-30
Volume
45
Issue
15
Pages
154015
ISSN
  • 0953-4075 (ISSN-L)
  • 1361-6455
OpenAlex
W2061147302
Cited by
18
References
41
Citations by year
2023: 1 · 2022: 1 · 2019: 2 · 2018: 1 · 2017: 2 · 2016: 1 · 2015: 2 · 2014: 2 · 2013: 5 · 2012: 1
FWCI
1.66
Type
journal article
Language
en
Open access
Locations
  • Journal of Physics B Atomic Molecular and Optical Physics (publishedVersion)
  • Swinburne figshare (Swinburne University of Technology) (submittedVersion)
Funders
Australian Research Council
Topics
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Spectroscopy and Quantum Chemical Studies
  • Physical Sciences › Chemistry › Physical and Theoretical Chemistry › Photochemistry and Electron Transfer Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Photosynthetic Processes and Mechanisms
Keywords
light-harvesting complexes, coherent dynamics, dephasing rate, temperature dependence, coherent excitation, phonon coupling, energy transfer, vibrational modes

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