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Double-crossed polarization transient grating for distinction and characterization of coherences

Paleček, David LU and Zigmantas, Donatas LU orcid (2018) In Optics Express 26(25). p.32900-32907
Abstract

Coherent phenomena have been widely suggested to play a role in efficient photosynthetic light harvesting and charge separation processes. To substantiate these ideas, separation of intramolecular vibrational coherences from purely electronic or mixed vibronic coherences is essential. To this end, polarization-controlled two-dimensional electronic spectroscopy has been shown to provide an effective selectivity. We show that analogous discrimination can be achieved in a transient grating experiment by employing the double-crossed polarization scheme. This is demonstrated in a study of bacterial reaction centers. Significantly faster acquisition times of these experiments make longer population time scans feasible, thereby achieving... (More)

Coherent phenomena have been widely suggested to play a role in efficient photosynthetic light harvesting and charge separation processes. To substantiate these ideas, separation of intramolecular vibrational coherences from purely electronic or mixed vibronic coherences is essential. To this end, polarization-controlled two-dimensional electronic spectroscopy has been shown to provide an effective selectivity. We show that analogous discrimination can be achieved in a transient grating experiment by employing the double-crossed polarization scheme. This is demonstrated in a study of bacterial reaction centers. Significantly faster acquisition times of these experiments make longer population time scans feasible, thereby achieving improved frequency resolution and allowing for accurate extraction of coherence frequencies and dephasing times. These parameters are crucial for the discussion on relevance of the measured coherences to energy or electron transfer phenomena.

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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Optics Express
volume
26
issue
25
pages
8 pages
publisher
Optical Society of America
external identifiers
  • scopus:85058168713
ISSN
1094-4087
DOI
10.1364/OE.26.032900
language
English
LU publication?
yes
id
9d6b2804-87a8-45a3-8277-56177fdd1994
date added to LUP
2018-12-18 13:21:20
date last changed
2021-09-22 03:38:01
@article{9d6b2804-87a8-45a3-8277-56177fdd1994,
  abstract     = {<p>Coherent phenomena have been widely suggested to play a role in efficient photosynthetic light harvesting and charge separation processes. To substantiate these ideas, separation of intramolecular vibrational coherences from purely electronic or mixed vibronic coherences is essential. To this end, polarization-controlled two-dimensional electronic spectroscopy has been shown to provide an effective selectivity. We show that analogous discrimination can be achieved in a transient grating experiment by employing the double-crossed polarization scheme. This is demonstrated in a study of bacterial reaction centers. Significantly faster acquisition times of these experiments make longer population time scans feasible, thereby achieving improved frequency resolution and allowing for accurate extraction of coherence frequencies and dephasing times. These parameters are crucial for the discussion on relevance of the measured coherences to energy or electron transfer phenomena.</p>},
  author       = {Paleček, David and Zigmantas, Donatas},
  issn         = {1094-4087},
  language     = {eng},
  number       = {25},
  pages        = {32900--32907},
  publisher    = {Optical Society of America},
  series       = {Optics Express},
  title        = {Double-crossed polarization transient grating for distinction and characterization of coherences},
  url          = {http://dx.doi.org/10.1364/OE.26.032900},
  doi          = {10.1364/OE.26.032900},
  volume       = {26},
  year         = {2018},
}