金属材料介电特性对其纳米粒子消光光谱的影响

Effects of the Dielectric Property to the Metal Material on the Extinction Spectrum of the Nanoparticles

本文采用离散偶极子近似理论,研究金、银两种金属的球形和棒状纳米粒子的消光光谱.计算结果表明:金、银两种材料的纳米粒子,其消光光谱的强度和峰位存在一定的差异.该研究将为纳米粒子在光电器件、化学传感元件等领域中的应用提供有益的理论参考.

In this article, the Discrete Dipole Approximation （DDA） was used to calculate the extinction spectra of the gold and silver nanoparticles with the shape of sphere and cylinder. The results showed that the peak place and the strength of the extinction spectra of the nanoparticles with different material were distinct. This research will provide some useful theoretical reference for the applications of the nanoparticles in the fields of photoelectric device and chemistry sensor etc.