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

被引：67

作者：

Tsargorodska, Anna ^{[1
]}

Cartron, Michael L. ^{[2
]}

Vasilev, Cvetelin ^{[2
]}

Kodali, Goutham ^{[3
,4
]}

Mass, Olga A. ^{[5
]}

Baumberg, Jeremy J. ^{[6
]}

Dutton, P. Leslie ^{[3
,4
]}

Hunter, C. Neil ^{[2
]}

Torma, Paivi ^{[7
]}

Leggett, Graham J. ^{[1
]}

机构：

[1] Univ Sheffield, Dept Chem, Brook Hill, Sheffield S3 7HF, S Yorkshire, England

[2] Univ Sheffield, Dept Mol Biol & Biotechnol, Western Bank, Sheffield S10 2TN, S Yorkshire, England

[3] Univ Penn, Johnson Res Fdn, Philadelphia, PA 10104 USA

[4] Univ Penn, Dept Biochem & Biophys, Philadelphia, PA 10104 USA

[5] North Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA

[6] Univ Cambridge, Dept Phys, Cavendish Lab, JJ Thomson Ave, Cambridge CB3 0HE, England

[7] Aalto Univ, Sch Sci, COMP Ctr Excellence, Dept Appl Phys, POB 15100, Aalto 00076, Finland

来源：

NANO LETTERS | 2016年 / 16卷 / 11期

基金：

芬兰科学院; 英国生物技术与生命科学研究理事会; 英国工程与自然科学研究理事会; 欧洲研究理事会;

关键词：

Strong coupling; plasmonic nanoparticles; light harvesting complexes; purple bacteria; photosynthesis; DE-NOVO SYNTHESIS; ENERGY-TRANSFER; PHOTOSYNTHETIC MEMBRANE; RHODOBACTER-SPHAEROIDES; LATTICE RESONANCES; FANO RESONANCE; NANOSTRUCTURES; DESIGN; NANOPARTICLES; FLUORESCENCE;

D O I：

10.1021/acs.nanolett.6b02661

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：6850 / 6856

页数：7

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