Excitation of multiple dipole surface plasmon resonances in spherical silver nanoparticles

被引：15

作者：

Niesen, Bjoern ^{[1
,2
]}

Rand, Barry P. ^{[1
]}

Van Dorpe, Pol ^{[1
,2
]}

Shen, Honghui ^{[3
]}

Maes, Bjorn ^{[3
]}

Genoe, Jan ^{[1
]}

Heremans, Paul ^{[1
,2
]}

机构：

[1] IMEC VZW, B-3001 Louvain, Belgium

[2] Katholieke Univ Leuven, Dept Elect Engn ESAT, B-3001 Louvain, Belgium

[3] Univ Ghent, Dept Informat Technol INTEC, IMEC, B-9000 Ghent, Belgium

来源：

OPTICS EXPRESS | 2010年 / 18卷 / 18期

关键词：

METAL NANOPARTICLES; SOLAR-CELLS; GOLD NANOPARTICLES; OPTICAL-PROPERTIES; ENHANCEMENT; SHAPE; SIZE; ENVIRONMENT; ABSORPTION; DEPENDENCE;

D O I：

10.1364/OE.18.019032

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We observe the appearance of multiple dipole surface plasmon resonances in spherical Ag nanoparticles when embedded in an organic semiconductor that exhibits a highly dispersive permittivity. Comparing the absorption spectra of thin-films with and without Ag nanoparticles reveals the presence of two plasmon peaks. Numerical simulations and calculations based on an electrostatic model allow us to attribute both peaks to dipole resonances, and show that the strong dispersion of the organic permittivity is responsible for this behavior. The presence of these two plasmon resonances was found to enhance the absorption of the organic semiconductor over a broad wavelength range. (c) 2010 Optical Society of America

引用

页码：19032 / 19038

页数：7

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