Plasmon Coupling in Silver Nanocube Dimers: Resonance Splitting Induced by Edge Rounding

被引：142

作者：

Grillet, Nadia ^{[1
]}

Manchon, Delphine ^{[1
]}

Bertorelle, Franck ^{[1
]}

Bonnet, Christophe ^{[1
]}

Broyer, Michel ^{[1
]}

Cottancin, Emmanuel ^{[1
]}

Lerme, Jean ^{[1
]}

Hillenkamp, Matthias ^{[1
]}

Pellarin, Michel ^{[1
]}

机构：

[1] Univ Lyon 1, Univ Lyon, CNRS, Lab Spectrometrie Ion & Mol,UMR 5579 43, F-69622 Villeurbanne, France

来源：

ACS NANO | 2011年 / 5卷 / 12期

关键词：

plasmon coupling; nanocube dimers; silver nanoparticles; single nanoparticle spectroscopy; DDA calculations; ENHANCED RAMAN-SCATTERING; NANOPARTICLE PAIRS; OPTICAL-PROPERTIES; METAL NANOPARTICLES; CONDUCTIVE CONTACT; SINGLE GOLD; DIPOLE; NANOSTRUCTURES; SPECTROSCOPY; SPECTRUM;

D O I：

10.1021/nn2041329

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Absolute extinction cross sections of individual silver nanocube dimers are measured using spatial modulation spectroscopy In correlation with their transmission electron microscopy images. For very small interparticle distances and an incident light polarized along the dimer axis, we give evidence for a clear splitting of the main dipolar surface plasmon resonance which is found to be essentially induced by cube edge rounding effects. Supported by discrete dipole approximation and finite element method calculations, this phenomenon highlights the high sensitivity of the plasmonic coupling to the exact shape of the effective capacitor formed by the facing surfaces of both particles, especially in the regime of very close proximity.

引用

页码：9450 / 9462

页数：13

共 56 条

[1] Plasmon Near-Field Coupling in Metal Dimers as a Step toward Single-Molecule Sensing [J].