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Optical cavity-mediated exciton dynamics in photosynthetic light harvesting 2 complexes

Wu, Fan LU ; Finkelstein-Shapiro, Daniel LU ; Wang, Mao ; Rosenkampff, Ilmari LU ; Yartsev, Arkady LU orcid ; Pascher, Torbjörn LU ; Nguyen- Phan, Tu C. ; Cogdell, Richard ; Börjesson, Karl and Pullerits, Tönu LU (2022) In Nature Communications 13(1).
Abstract

Strong light-matter interaction leads to the formation of hybrid polariton states and alters the photophysical dynamics of organic materials and biological systems without modifying their chemical structure. Here, we experimentally investigated a well-known photosynthetic protein, light harvesting 2 complexes (LH2) from purple bacteria under strong coupling with the light mode of a Fabry-Perot optical microcavity. Using femtosecond pump probe spectroscopy, we analyzed the polariton dynamics of the strongly coupled system and observed a significant prolongation of the excited state lifetime compared with the bare exciton, which can be explained in terms of the exciton reservoir model. Our findings indicate the potential of tuning the... (More)

Strong light-matter interaction leads to the formation of hybrid polariton states and alters the photophysical dynamics of organic materials and biological systems without modifying their chemical structure. Here, we experimentally investigated a well-known photosynthetic protein, light harvesting 2 complexes (LH2) from purple bacteria under strong coupling with the light mode of a Fabry-Perot optical microcavity. Using femtosecond pump probe spectroscopy, we analyzed the polariton dynamics of the strongly coupled system and observed a significant prolongation of the excited state lifetime compared with the bare exciton, which can be explained in terms of the exciton reservoir model. Our findings indicate the potential of tuning the dynamic of the whole photosynthetic unit, which contains several light harvesting complexes and reaction centers, with the help of strong exciton-photon coupling, and opening the discussion about possible design strategies of artificial photosynthetic devices.

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author
; ; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nature Communications
volume
13
issue
1
article number
6864
publisher
Nature Publishing Group
external identifiers
  • scopus:85141680238
  • pmid:36369202
ISSN
2041-1723
DOI
10.1038/s41467-022-34613-x
language
English
LU publication?
yes
id
8e0759f5-0be0-4a92-9692-b7d5bb5f290e
date added to LUP
2022-12-05 10:59:36
date last changed
2024-09-20 06:05:00
@article{8e0759f5-0be0-4a92-9692-b7d5bb5f290e,
  abstract     = {{<p>Strong light-matter interaction leads to the formation of hybrid polariton states and alters the photophysical dynamics of organic materials and biological systems without modifying their chemical structure. Here, we experimentally investigated a well-known photosynthetic protein, light harvesting 2 complexes (LH2) from purple bacteria under strong coupling with the light mode of a Fabry-Perot optical microcavity. Using femtosecond pump probe spectroscopy, we analyzed the polariton dynamics of the strongly coupled system and observed a significant prolongation of the excited state lifetime compared with the bare exciton, which can be explained in terms of the exciton reservoir model. Our findings indicate the potential of tuning the dynamic of the whole photosynthetic unit, which contains several light harvesting complexes and reaction centers, with the help of strong exciton-photon coupling, and opening the discussion about possible design strategies of artificial photosynthetic devices.</p>}},
  author       = {{Wu, Fan and Finkelstein-Shapiro, Daniel and Wang, Mao and Rosenkampff, Ilmari and Yartsev, Arkady and Pascher, Torbjörn and Nguyen- Phan, Tu C. and Cogdell, Richard and Börjesson, Karl and Pullerits, Tönu}},
  issn         = {{2041-1723}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{Nature Publishing Group}},
  series       = {{Nature Communications}},
  title        = {{Optical cavity-mediated exciton dynamics in photosynthetic light harvesting 2 complexes}},
  url          = {{http://dx.doi.org/10.1038/s41467-022-34613-x}},
  doi          = {{10.1038/s41467-022-34613-x}},
  volume       = {{13}},
  year         = {{2022}},
}