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Title: Strong Coupling of Localized Surface Plasmons to Excitons in Light-Harvesting Complexes

Abstract

Gold nanostructure arrays exhibit surface plasmon resonances that split after attaching light harvesting complexes 1 and 2 (LH1 and LH2) from purple bacteria. The splitting is attributed to strong coupling between the localized surface plasmon resonances and excitons in the light-harvesting complexes. Wild-type and mutant LH1 and LH2 from Rhodobacter sphaeroides containing different carotenoids yield different splitting energies, demonstrating that the coupling mechanism is sensitive to the electronic states in the light harvesting complexes. Plasmon–exciton coupling models reveal different coupling strengths depending on the molecular organization and the protein coverage, consistent with strong coupling. Strong coupling was also observed for self-assembling polypeptide maquettes that contain only chlorins. However, it is not observed for monolayers of bacteriochlorophyll, indicating that strong plasmon–exciton coupling is sensitive to the specific presentation of the pigment molecules.

Authors:
 [1];  [2];  [2];  [3];  [4];  [5];  [3];  [2];  [6];  [1]
  1. Department of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, U.K.
  2. Department of Molecular Biology and Biotechnology, University of Sheffield, Western Bank, Sheffield S10 2TN, U.K.
  3. The Johnson Research Foundation and Department of Biochemistry and Biophysics, University of Pennsylvania, Philadelphia, Pennsylvania 10104, United States
  4. Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, United States
  5. Cavendish Laboratory, Dept. of Physics, University of Cambridge, J. J. Thomson Ave, Cambridge, CB3 0HE, U.K.
  6. COMP Centre of Excellence, Department of Applied Physics, Aalto University, School of Science, P.O. Box 15100, 00076 Aalto, Finland
Publication Date:
Research Org.:
Washington Univ., St. Louis, MO (United States); Energy Frontier Research Centers (EFRC) (United States). Photosynthetic Antenna Research Center (PARC)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1334197
Alternate Identifier(s):
OSTI ID: 1425482
Grant/Contract Number:  
SC0001035
Resource Type:
Published Article
Journal Name:
Nano Letters
Additional Journal Information:
Journal Name: Nano Letters Journal Volume: 16 Journal Issue: 11; Journal ID: ISSN 1530-6984
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Tsargorodska, Anna, Cartron, Michaël L., Vasilev, Cvetelin, Kodali, Goutham, Mass, Olga A., Baumberg, Jeremy J., Dutton, P. Leslie, Hunter, C. Neil, Törmä, Päivi, and Leggett, Graham J. Strong Coupling of Localized Surface Plasmons to Excitons in Light-Harvesting Complexes. United States: N. p., 2016. Web. doi:10.1021/acs.nanolett.6b02661.
Tsargorodska, Anna, Cartron, Michaël L., Vasilev, Cvetelin, Kodali, Goutham, Mass, Olga A., Baumberg, Jeremy J., Dutton, P. Leslie, Hunter, C. Neil, Törmä, Päivi, & Leggett, Graham J. Strong Coupling of Localized Surface Plasmons to Excitons in Light-Harvesting Complexes. United States. doi:10.1021/acs.nanolett.6b02661.
Tsargorodska, Anna, Cartron, Michaël L., Vasilev, Cvetelin, Kodali, Goutham, Mass, Olga A., Baumberg, Jeremy J., Dutton, P. Leslie, Hunter, C. Neil, Törmä, Päivi, and Leggett, Graham J. Mon . "Strong Coupling of Localized Surface Plasmons to Excitons in Light-Harvesting Complexes". United States. doi:10.1021/acs.nanolett.6b02661.
@article{osti_1334197,
title = {Strong Coupling of Localized Surface Plasmons to Excitons in Light-Harvesting Complexes},
author = {Tsargorodska, Anna and Cartron, Michaël L. and Vasilev, Cvetelin and Kodali, Goutham and Mass, Olga A. and Baumberg, Jeremy J. and Dutton, P. Leslie and Hunter, C. Neil and Törmä, Päivi and Leggett, Graham J.},
abstractNote = {Gold nanostructure arrays exhibit surface plasmon resonances that split after attaching light harvesting complexes 1 and 2 (LH1 and LH2) from purple bacteria. The splitting is attributed to strong coupling between the localized surface plasmon resonances and excitons in the light-harvesting complexes. Wild-type and mutant LH1 and LH2 from Rhodobacter sphaeroides containing different carotenoids yield different splitting energies, demonstrating that the coupling mechanism is sensitive to the electronic states in the light harvesting complexes. Plasmon–exciton coupling models reveal different coupling strengths depending on the molecular organization and the protein coverage, consistent with strong coupling. Strong coupling was also observed for self-assembling polypeptide maquettes that contain only chlorins. However, it is not observed for monolayers of bacteriochlorophyll, indicating that strong plasmon–exciton coupling is sensitive to the specific presentation of the pigment molecules.},
doi = {10.1021/acs.nanolett.6b02661},
journal = {Nano Letters},
number = 11,
volume = 16,
place = {United States},
year = {2016},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1021/acs.nanolett.6b02661

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