Quantum control of energy flow in light harvesting.
(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:
https://lup.lub.lu.se/record/108602
- author
- Herek, Jennifer LU ; Wohlleben, Wendel ; Cogdell, Richard J ; Zeidler, Dirk and Motzkus, Marcus
- organization
- publishing date
- 2002
- 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
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)
- id
- 2114dff9-292b-4c9d-96df-d1c7cbfbf0c2 (old id 108602)
- date added to LUP
- 2016-04-01 12:12:33
- date last changed
- 2022-04-29 02:07:04
@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}},
keywords = {{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}},
doi = {{10.1038/417533a}},
volume = {{417}},
year = {{2002}},
}