中文摘要：

我们利用电磁场仿真软件CST分别对单个金纳米小球,单层纳米球和双层纳米球阵列在可见光波段的光吸收特性进行了仿真,所得结果与参考文献中实验数据一致,证明了方法的正确性.在此基础上对仿真结果进行了定性的分析,给出了影响纳米球等离激元谐振波长和吸收效率的因素.最后,我们将金纳米小球应用到超导单光子探测器中,测量了有金纳米颗粒和无金纳米颗粒时超导纳米线临界电流的变化,观察到金纳米颗粒表面等离激元共振引起的临界电流的大幅度变化,结合仿真,对实验测量结果给出了合理的解释.

英文摘要：

We simulate the absorbance of single Au nanoparticle, single-layer and double-layer Au nanoparticles in the visible light range by COMPUTER SIMULATION TECHNOLOGY（CST）. The simulation results agree with experimental results, which demonstrate the validity of our model used in CST. Then, we discuss the influences of several factors, such as the size of Au nanoparticle, the distance between nanoparticles and the dielectric constant of coating materials, on the absorbance and the wavelength of surface plasmon resonance. Finally, we apply Au nanoparticles in superconducting nanowire single photon detectors and observe a substantial change of the critical current caused by surface plasmon resonance of Au nanoparticles. We give a reasonable explanation to our experiment.