A synthetic biological quantum optical system

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Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2018-07-21
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Language
en
Pages
10
13064-13073
Series
Nanoscale, Volume 10, issue 27
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.
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Lishchuk , A , Kodali , G , Mancini , J A , Broadbent , M , Darroch , B , Mass , O A , Nabok , A , Dutton , P L , Hunter , C N , Törmä , P & Leggett , G J 2018 , ' A synthetic biological quantum optical system ' , Nanoscale , vol. 10 , no. 27 , pp. 13064-13073 . https://doi.org/10.1039/c8nr02144a