Nonlocality and particle-clustering effects on the optical response of composite materials with metallic nanoparticles

被引：0
作者：
C. W. Chen
H. Y. Chung
H.-P. Chiang
J. Y. Lu
R. Chang
D. P. Tsai
P. T. Leung
机构：
[1] National Taiwan Ocean University,Institute of Optoelectronic Sciences
[2] Academia Sinica,Institute of Physics
[3] National Applied Research Laboratories,Instrument Technology Research Center
[4] National Taiwan University,Department of Physics
[5] Portland State University,Department of Physics
来源：
Applied Physics A | 2010年 / 101卷
关键词：
Fractal Dimension; Metal Particle; Dielectric Function; Metallic Nanoparticles; Effective Medium Theory;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The optical properties of composites with metallic nanoparticles are studied, taking into account the effects due to the nonlocal dielectric response of the metal and the coalescing of the particles to form clusters. An approach based on various effective medium theories is followed, and the modeling results are compared with those from the cases with local response and particles randomly distributed through the host medium. Possible observations of our modeling results are illustrated via a calculation of the transmission of light through a thin film made of these materials. It is found that the nonlocal effects are particularly significant when the particles coalesce, leading to blue-shifted resonances and slightly lower values in the dielectric functions. The dependence of these effects on the volume fraction and fractal dimension of the metal clusters is studied in detail.
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页码：191 / 198
页数：7
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