Surface Plasmon Resonance Enhanced Magneto-Optics (SuPREMO): Faraday Rotation Enhancement in Gold-Coated Iron Oxide Nanocrystals

被引：266

作者：

Jain, Prashant K. ^{[1
]}

Xiao, Yanhong ^{[3
]}

Walsworth, Ronald ^{[2
,3
]}

Cohen, Adam E. ^{[1
,2
]}

机构：

[1] Harvard Univ, Dept Chem & Chem Biol, Cambridge, MA 02138 USA

[2] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[3] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

来源：

NANO LETTERS | 2009年 / 9卷 / 04期

基金：

美国国家科学基金会;

关键词：

OPTICAL-PROPERTIES; SILVER NANOPARTICLES; RAMAN-SCATTERING; MULTILAYER FILMS; KERR ROTATION; NANOSHELLS; OXIDATION; MAGNETITE; THERAPY; SPECTRA;

D O I：

10.1021/nl900007k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report enhanced optical Faraday rotation in gold-coated maghemite (gamma-Fe2O3) nanoparticles. The Faraday rotation spectrum measured from 480-690 nm shows a peak at about 530 nm, not present in either uncoated maghemite nanoparticles or solid gold nanoparticles. This peak corresponds to an intrinsic electronic transition in the maghemite nanoparticles and is consistent with a near-field enhancement of Faraday rotation resulting from the spectral overlap of the surface plasmon resonance in the gold with the electronic transition in maghemite. This demonstration of surface plasmon resonance-enhanced magneto-optics (SuPREMO) in a composite magnetialplasmonic nanosystem may enable design of nanostructures for remote sensing and imaging of magnetic fields and for miniaturized magneto-optical devices.

引用

页码：1644 / 1650

页数：7

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