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Quantum control of energy flow in light harvesting.

Herek, Jennifer LU ; Wohlleben, Wendel; Cogdell, Richard J; Zeidler, Dirk and Motzkus, Marcus (2002) In Nature 417(6888). p.533-535
Abstract
Coherent light sources have been widely used in control schemes that exploit quantum interference effects to direct the outcome of photochemical processes. The adaptive shaping of laser pulses is a particularly powerful tool in this context: experimental output as feedback in an iterative learning loop refines the applied laser field to render it best suited to constraints set by the experimenter. This approach has been experimentally implemented to control a variety of processes, but the extent to which coherent excitation can also be used to direct the dynamics of complex molecular systems in a condensed-phase environment remains unclear. Here we report feedback-optimized coherent control over the energy-flow pathways in the... (More)
Coherent light sources have been widely used in control schemes that exploit quantum interference effects to direct the outcome of photochemical processes. The adaptive shaping of laser pulses is a particularly powerful tool in this context: experimental output as feedback in an iterative learning loop refines the applied laser field to render it best suited to constraints set by the experimenter. This approach has been experimentally implemented to control a variety of processes, but the extent to which coherent excitation can also be used to direct the dynamics of complex molecular systems in a condensed-phase environment remains unclear. Here we report feedback-optimized coherent control over the energy-flow pathways in the light-harvesting antenna complex LH2 from Rhodopseudomonas acidophila, a photosynthetic purple bacterium. We show that phases imprinted by the light field mediate the branching ratio of energy transfer between intra- and intermolecular channels in the complex's donor acceptor system. This result illustrates that molecular complexity need not prevent coherent control, which can thus be extended to probe and affect biological functions. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Photosynthetic Reaction Center, Molecular, Models, Light, Kinetics, Energy Transfer, Bacterial : metabolism, Protein Structure, Quaternary, Rhodopseudomonas : chemistry, Rhodopseudomonas : metabolism, Bacterial : chemistry
in
Nature
volume
417
issue
6888
pages
533 - 535
publisher
Nature Publishing Group
external identifiers
  • pmid:12037563
  • wos:000175860300037
  • scopus:0037198619
ISSN
0028-0836
DOI
10.1038/417533a
language
English
LU publication?
yes
id
2114dff9-292b-4c9d-96df-d1c7cbfbf0c2 (old id 108602)
date added to LUP
2007-07-03 13:26:34
date last changed
2017-11-19 03:34:19
@article{2114dff9-292b-4c9d-96df-d1c7cbfbf0c2,
  abstract     = {Coherent light sources have been widely used in control schemes that exploit quantum interference effects to direct the outcome of photochemical processes. The adaptive shaping of laser pulses is a particularly powerful tool in this context: experimental output as feedback in an iterative learning loop refines the applied laser field to render it best suited to constraints set by the experimenter. This approach has been experimentally implemented to control a variety of processes, but the extent to which coherent excitation can also be used to direct the dynamics of complex molecular systems in a condensed-phase environment remains unclear. Here we report feedback-optimized coherent control over the energy-flow pathways in the light-harvesting antenna complex LH2 from Rhodopseudomonas acidophila, a photosynthetic purple bacterium. We show that phases imprinted by the light field mediate the branching ratio of energy transfer between intra- and intermolecular channels in the complex's donor acceptor system. This result illustrates that molecular complexity need not prevent coherent control, which can thus be extended to probe and affect biological functions.},
  author       = {Herek, Jennifer and Wohlleben, Wendel and Cogdell, Richard J and Zeidler, Dirk and Motzkus, Marcus},
  issn         = {0028-0836},
  keyword      = {Photosynthetic Reaction Center,Molecular,Models,Light,Kinetics,Energy Transfer,Bacterial : metabolism,Protein Structure,Quaternary,Rhodopseudomonas : chemistry,Rhodopseudomonas : metabolism,Bacterial : chemistry},
  language     = {eng},
  number       = {6888},
  pages        = {533--535},
  publisher    = {Nature Publishing Group},
  series       = {Nature},
  title        = {Quantum control of energy flow in light harvesting.},
  url          = {http://dx.doi.org/10.1038/417533a},
  volume       = {417},
  year         = {2002},
}