Spectroscopic mode mapping of resonant plasmon nanoantennas

被引：331

作者：

Ghenuche, Petru ^{[1
,2
]}

Cherukulappurath, Sudhir

Taminiau, Tim H.

van Hulst, Niek F.

Quidant, Romain

机构：

[1] Inst Space Sci, Bucharest, Romania

[2] ICFO Inst Ciencies Foton, Barcelona 08860, Spain

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.101.116805

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present spatially resolved spectral mode mapping of resonant plasmon gap antennas using two-photon luminescence microspectroscopy. The obtained maps are in good agreement with 3D calculations of the antenna modes. The evolution of the modal field with wavelength, both in the gap and along the two coupled gold nanowires forming the antenna, is directly visualized. At resonance, the luminescence for the gap area is enhanced at least 80 times and a comparison with the antenna extremities shows a dynamical charge redistribution due to the near-field coupling between the two arms.

引用

页数：4

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