| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Dielectric layer-dependent surface plasmon effect of metallic nanoparticles on silicon substrate |
| Xu Rui(徐锐)a), Wang Xiao-Dong(王晓东)a)†, Liu Wen(刘雯)a), Xu Xiao-Na(徐晓娜)a), Li Yue-Qiang(李越强)a), Ji An(季安)a), Yang Fu-Hua(杨富华)a)b), and Li Jin-Min(李晋闽)c) |
a. Engineering Research Center for Semiconductor Integrated Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China;
b. The State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China;
c. Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China |
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Abstract 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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Received: 07 August 2011
Revised: 21 September 2011
Accepted manuscript online:
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PACS:
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52.40.Hf
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(Plasma-material interactions; boundary layer effects)
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52.40.Fd
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(Plasma interactions with antennas; plasma-filled waveguides)
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| Fund: Project supported by the National Basic Research Program of China (Grant Nos. 2010CB934104 and 2010CB933800) and the National Natural Science Foundation of China (Grant Nos. 60606024 and 61076077). |
Corresponding Authors:
Wang Xiao-Dong,xdwang@semi.ac.cn
E-mail: xdwang@semi.ac.cn
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Cite this article:
Xu Rui(徐锐), Wang Xiao-Dong(王晓东), Liu Wen(刘雯), Xu Xiao-Na(徐晓娜), Li Yue-Qiang(李越强), Ji An(季安), Yang Fu-Hua(杨富华), and Li Jin-Min(李晋闽) Dielectric layer-dependent surface plasmon effect of metallic nanoparticles on silicon substrate 2012 Chin. Phys. B 21 025202
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