Electron-beam mapping of plasmon resonances in electromagnetically interacting gold nanorods

被引：71

作者：

N'Gom, Moussa ^{[1
,2
]}

Li, Shuzhou ^{[3
]}

Schatz, George ^{[3
]}

Erni, Rolf ^{[4
]}

Agarwal, Ashish ^{[5
]}

Kotov, Nicholas ^{[5
]}

Norris, Theodore B. ^{[2
,6
]}

机构：

[1] Univ Michigan, Dept Appl Phys, Ann Arbor, MI 48109 USA

[2] Univ Michigan, Ctr Ultrafast Opt Sci, Ann Arbor, MI 48109 USA

[3] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

[4] Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA

[5] Univ Michigan, Dept Chem Engn, Ann Arbor, MI 48109 USA

[6] Univ Michigan, Dept EECS, Ann Arbor, MI 48109 USA

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 11期

关键词：

ENERGY-LOSS; NANOPARTICLES; SPECTROSCOPY; FIELDS; MODES;

D O I：

10.1103/PhysRevB.80.113411

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Electron energy-loss spectroscopy and energy-filtered transmission electron-microscope imaging are used to characterize the energy distribution of the surface plasmon of isolated and coupled gold nanorods. Local-field enhancement and spectral shift of the plasmon modes are observed for two interacting nanoparticles. The spatial modes measured by energy loss are shown to share qualitative similarities with the electromagnetic field distribution around gold nanorods induced by optical excitation as simulated using the discrete dipole-approximation method.

引用

页数：4

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