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Issue 27, 2018
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A synthetic biological quantum optical system

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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.

Graphical abstract: A synthetic biological quantum optical system

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Publication details

The article was received on 14 Mar 2018, accepted on 06 Jun 2018 and first published on 29 Jun 2018


Article type: Paper
DOI: 10.1039/C8NR02144A
Citation: Nanoscale, 2018,10, 13064-13073
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    A synthetic biological quantum optical system

    A. Lishchuk, G. Kodali, J. A. Mancini, M. Broadbent, B. Darroch, O. A. Mass, A. Nabok, P. L. Dutton, C. N. Hunter, P. Törmä and G. J. Leggett, Nanoscale, 2018, 10, 13064
    DOI: 10.1039/C8NR02144A

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