Mapping the Electromagnetic Near-Field Enhancements of Gold Nanocubes

被引：42

作者：

Deeb, Claire ^{[1
,2
]}

Zhou, Xuan ^{[1
]}

Miller, Ryan ^{[2
]}

Gray, Stephen K. ^{[2
]}

Marguet, Sylvie ^{[3
]}

Plain, Jerome ^{[1
]}

Wiederrecht, Gary P. ^{[2
]}

Bachelot, Renaud ^{[1
]}

机构：

[1] Univ Technol Troyes, LNIO, CNRS UMR 6279, Troyes, France

[2] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA

[3] CNRS CEA, IRAMIS, SPAM, Lab Francis Perrin,URA2453, F-91191 Gif Sur Yvette, France

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 46期

关键词：

SILVER NANOCUBES; PHOTOPOLYMERIZATION; NANOPARTICLES; SUBSTRATE; POLYMER; SPOTS; HOT;

D O I：

10.1021/jp304647e

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We imaged and quantitatively characterized electromagnetic hot spots near the surfaces of plasmon resonant gold nanocubes. The strongest fields are localized at the nanocube corners as Compared to those on the sides. The near field enhancement on the surface of the cube was imaged as a function of incident polarization, leading to information on the localization of fields on specific regions on the surface. We found that the field intensity drops dramatically when the nanocube corner is slightly tilted with respect to the incident laser polarization. This dramatic dependence on angle was verified by electrodynamics simulations. These results will enable the use of gold nanocubes in field enhancement applications and refractive index sensing.

引用

页码：24734 / 24740

页数：7

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