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A synthetic biological quantum optical system.

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.

SUBMITTER: Lishchuk A

PROVIDER: S-EPMC6044288 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature

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A synthetic biological quantum optical system.

Lishchuk Anna A Kodali Goutham G Mancini Joshua A JA Broadbent Matthew M Darroch Brice B Mass Olga A OA Nabok Alexei A Dutton P Leslie PL Hunter C Neil CN Törmä Päivi P Leggett Graham J GJ

Nanoscale 20180701 27

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 energ ...[more]

PMID: 29956712

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