School of Physics, State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871, China.
Chemphyschem. 2012 Jul 16;13(10):2573-7. doi: 10.1002/cphc.201200078. Epub 2012 May 30.
We introduce an effective refractive-index model to predict the spectral positions of localized surface plasmon (LSP) modes of a silver nanoparticle on a thin-film silicon substrate using a semi-analytical method. The enhanced scattering into the substrate caused by the nanoparticle dipole and quadrupole modes is verified by comparing theoretical and simulation results. We suggest that the LSP modes can be tuned linearly with the thickness of the silicon substrate and the size of the nanoparticles. These findings provide simple and important physical insights for optimizing the absorption in a thin-film silicon solar cell by tuning the LSP modes of the nanoparticles deployed on the surface.
我们提出了一种有效的折射率模型，使用半解析方法预测银纳米粒子在薄膜硅衬底上的局域表面等离子体（LSP）模式的光谱位置。通过比较理论和模拟结果，验证了纳米粒子偶极子和四极子模式引起的增强散射到衬底中。我们建议 LSP 模式可以通过硅衬底的厚度和纳米粒子的尺寸线性调谐。这些发现为通过调谐表面上部署的纳米粒子的 LSP 模式来优化薄膜硅太阳能电池的吸收提供了简单而重要的物理见解。
