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

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

  • Anna Tsargorodska
  • Michaël L. Cartron
  • Cvetelin Vasilev
  • Goutham Kodali
  • Olga A. Mass
  • Jeremy J. Baumberg
  • P. Leslie Dutton
  • C. Neil Hunter
  • Professor Päivi Törmä

  • Graham J. Leggett

Organisaatiot

  • University of Sheffield
  • University of Pennsylvania
  • North Carolina State University
  • University of Cambridge

Kuvaus

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.

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut6850-6856
Sivumäärä7
JulkaisuNano Letters
Vuosikerta16
Numero11
TilaJulkaistu - 9 marraskuuta 2016
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

ID: 9402118