Dielectric layer-dependent surface plasmon effect of metallic nanoparticles on silicon substrate

徐锐; 王晓东; 刘雯; 徐晓娜; 李越强; 季安; 杨富华; 李晋闽

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Dielectric layer-dependent surface plasmon effect of metallic nanoparticles on silicon substrate

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The electromagnetic interaction between Ag nanoparticles on the top of the Si substrate and the incident light has been studied by numerical simulations.It is found that the presence of dielectric layers with different thicknesses leads to the varied resonance wavelength and scattering cross section and consequently the shifted photocurrent response for all wavelengths.These different behaviours are determined by whether the dielectric layer is beyond the domain where the elcetric field of metallic plasmons takes effect,combined with the effect of geometrical optics.It is revealed that for particles of a certain size,an appropriate dielectric thickness is desirable to achieve the best absorption.For a certain thickness of spacer,an appropriate granular size is also desirable.These observations have substantial applications for the optimization of surface plasmon enhanced silicon solar cells.

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《中国物理：英文版》 |2012年第2期|379-385|共7页
作者
徐锐; 王晓东; 刘雯; 徐晓娜; 李越强; 季安; 杨富华; 李晋闽;
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作者单位

Engineering Research Center for Semiconductor Integrated Technology;

Institute of Semiconductors;

Chinese Academy of Sciences;

Beijing 100083;

China;

The State Key Laboratory for Superlattices and Microstructures;

Institute of Semiconductors;

Chinese Academy of Sciences;

Beijing 100083;

China;

Key Laboratory of Semiconductor Materials Science;

Institute of Semiconductors;

Chinese Academy of Sciences;

Beijing 100083;

China;

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原文格式 PDF
正文语种 chi
中图分类等离子体物理学;
关键词
表面等离子; 金属纳米粒子; 介电层; 硅衬底; 体效应; 电磁相互作用; 金属等离子体; 介质厚度;

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Dielectric layer-dependent surface plasmon effect of metallic nanoparticles on silicon substrate

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