Work

Excited state coherent dynamics in light-harvesting complexes from photosynthetic marine algae

Year: 2012

Type: article

Abstract: We explore coherence dynamics in light-harvesting complexes and their interactions with other electronic states and vibrational modes. This is achieved by utilizing a two-colour four-wave mixing spectroscopy to excite and analyse a specific coherence pathway in the phycocyanin-645 (PC645) light-harvesting complex. We observe the dephasing rate increase as a function of temperature and oscillations in the signal intensity as a function of waiting time which reveals coherent excitation of pathways not directly resonant with the laser pulses. This coherent excitation of non-resonant electronic states implies strong coupling to phonon modes, which is necessary if coherent energy transfer between non-resonant states is to play any role in photosynthetic energy transfer.

Source: Journal of Physics B Atomic Molecular and Optical Physics

DOI: 10.1088/0953-4075/45/15/154015

Authors: G H Richards, K E Wilk, P M G Curmi, H M Quiney, J A Davis

Institutions: Swinburne University of Technology, UNSW Sydney, The University of Melbourne, ARC Centre of Excellence for Coherent X-ray Science

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: bronze

Funder: Australian Research Council

OpenAlex ID: W2061147302

FWCI: 1.547

Cites: 39

Cited by: 18

Related to: 10