Work

Time-Domain Line-Shape Analysis from 2D Spectroscopy to Precisely Determine Hamiltonian Parameters for a Photosynthetic Complex

Year: 2021

Type: article

Abstract: Optical signals come from coherences between quantum states, with spectral line widths determined by the coherences' dephasing dynamics. Using a 2D electronic spectrometer, we observe weak coherence- and rephasing-time-domain signals persisting to 1 ps in the Fenna-Matthews-Olson complex at 77 K. These are coherences between the ground and excited states prepared after the complex interacts once or three times with light, rather than zero-quantum coherences that are more frequently investigated following two interactions. Here, we use these small but persistent signal components to isolate spectral contributions with narrowed peaks and reveal the system's eigenenergies.

Source: The Journal of Physical Chemistry B

DOI: 10.1021/acs.jpcb.0c08012

Authors: Brian S. Rolczynski, Shu-Hao Yeh, Polina Navotnaya, Lawson T. Lloyd, Alan R. Ginzburg, Haibin Zheng, Marco A. Allodi, John P. Otto, Khuram Ashraf, Alastair T. Gardiner, Richard J. Cogdell, Sabre Kais, Gregory S. Engel

Institutions: University of Chicago, Hamad bin Khalifa University, Qatar Foundation, University of Glasgow, Purdue University West Lafayette

Language: English

Topic: Spectroscopy and Quantum Chemical Studies

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: U.S. Department of Energy, Arnold and Mabel Beckman Foundation, Camille and Henry Dreyfus Foundation, Office of the Secretary of Defense, Qatar National Research Fund, Division of Materials Research, Basic Energy Sciences, Air Force Office of Scientific Research

Awards: G1697798977, MAPPING ENERGY TRANSFER THROUGH CYANOBACTERIAL PHOTOSYNTHETIC LIGHT HARVESTING ANTENNAS WITH IN VIVO 2D ELECTRONIC SPECTROSCOPY TO MONITOR PHOTOPROTECTIVE MECHANISMS, G275226508, G4479867350, G520112476, G803355315, G837711380

OpenAlex ID: W3137909625

FWCI: 0.546

Cites: 37

Cited by: 7

Related to: 10