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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.
We use the electromagnetic field simulation software CST to simulate the light absorption characteristics of single gold nanosphere, single nanosphere and double nanosphere array in the visible light band, respectively. The results obtained are consistent with the experimental data in the reference, which proves the correctness of the method On this basis, the simulation results were qualitatively analyzed, and the factors affecting the resonance wavelength and absorption efficiency of the nanosphere plasmon were given.Finally, we applied the gold nanospheres to the superconducting single photon detector , The change of the critical current of the superconducting nanowires with gold nanoparticles and gold-free nanoparticles was measured, and the significant changes of the critical current caused by the surface plasmon resonance of the gold nanoparticles were observed. Combined with the simulation, the experimental measurement results were given A reasonable explanation.