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Donatas Zigmantas. Portrait.

Donatas Zigmantas

Professor

Donatas Zigmantas. Portrait.

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

Author

  • David Paleček
  • Donatas Zigmantas

Summary, in English

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.

Department/s

  • Chemical Physics
  • NanoLund: Centre for Nanoscience

Publishing year

2018

Language

English

Pages

32900-32907

Publication/Series

Optics Express

Volume

26

Issue

25

Document type

Journal article

Publisher

Optical Society of America

Topic

  • Atom and Molecular Physics and Optics
  • Physical Chemistry (including Surface- and Colloid Chemistry)

Status

Published

ISBN/ISSN/Other

  • ISSN: 1094-4087