Year: 2018
Type: article
Abstract: In strong plasmon-exciton coupling, a surface plasmon mode is coupled to an array of localized emitters to yield new hybrid light-matter states (plexcitons), whose properties may in principle be controlled via modification of the arrangement of emitters. We show that plasmon modes are strongly coupled to synthetic light-harvesting maquette proteins, and that the coupling can be controlled via alteration of the protein structure. For maquettes with a single chlorin binding site, the exciton energy (2.06 ± 0.07 eV) is close to the expected energy of the Qy transition. However, for maquettes containing two chlorin binding sites that are collinear in the field direction, an exciton energy of 2.20 ± 0.01 eV is obtained, intermediate between the energies of the Qx and Qy transitions of the chlorin. This observation is attributed to strong coupling of the LSPR to an H-dimer state not observed under weak coupling.
Source: Nanoscale
DOI: 10.1039/c8nr02144a
Authors: Anna Lishchuk, Goutham Kodali, Joshua A. Mancini, Matthew Broadbent, Brice Darroch, Olga A. Mass, Alexei Nabok, P. Leslie Dutton, C. Neil Hunter, Päivi Törmä, Graham J. Leggett
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Funders: U.S. Department of Energy, North Carolina State University, University of Exeter, Academy of Finland, Directorate for Biological Sciences, Office of Science, Engineering and Physical Sciences Research Council, Biotechnology and Biological Sciences Research Council, Basic Energy Sciences, H2020 European Research Council, FP7 Ideas: European Research Council
Awards: G1076600624, G1627106086, G1697798977, Low-Dimensional Chemistry, G2443694987, PHOTOSYNTHETIC ANTENNA RESEARCH CENTER (PARC) -- EFRC, G3388937525, Engineering new capacities for solar energy utilisation in bacteria, Powering cells with light: the synthetic biology of photosynthesis, Experimental Equipment Call, G5083244627, G6042984060, G7070988515, G903181020
OpenAlex ID: W2811503880