Plasmonics and Enhanced Magneto-Optics in Core-Shell Co-Ag Nanoparticles

被引：211

作者：

Wang, Lei ^{[1
]}

Clavero, Cesar ^{[2
]}

Huba, Zachary ^{[3
]}

Carroll, Kyler J. ^{[3
]}

Carpenter, Everett E. ^{[3
]}

Gu, Diefeng ^{[4
]}

Lukaszew, Rosa A. ^{[1
,2
]}

机构：

[1] Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA

[2] Coll William & Mary, Dept Appl Sci, Williamsburg, VA 23187 USA

[3] Virginia Commonwealth Univ, Dept Chem, Williamsburg, VA 23187 USA

[4] Appl Res Ctr, Newport News, VA 23606 USA

来源：

NANO LETTERS | 2011年 / 11卷 / 03期

基金：

美国国家科学基金会;

关键词：

Core-shell nanoparticles; localized surface plasmon resonance; magneto-optical effect; Faraday rotation; OPTICAL-PROPERTIES; RESONANCE; SENSITIVITY; NANOSHELLS; THERAPY;

D O I：

10.1021/nl1042243

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We present theoretical and experimental studies that explain the observed strong enhancement of the magneto-optical (MO) Faraday rotation in all-metal core-shell Co-Ag nanopartides (NPs) attributed to localized surface plasmon resonance (LSPR). We also explain why the optical absorption and MO spectra peaks appear blue-shifted with increased Co core size while keeping the NP size constant. Further, we demonstrate direct correlation between the strong LSPR induced electromagnetic fields and the enhanced MO activity of the NPs.

引用

页码：1237 / 1240

页数：4

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