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理论研究了金纳米球壳的几何结构参数,及物理参量对局域表面等离激元共振波长调谐特性的影响.结果表明,随着壳层厚度的增大,球壳消光共振峰先蓝移后红移,高阶峰转向时对应的壳层厚度比低阶峰大,且该厚度与球壳内径的比值随内径尺寸的增大而减小,随内核材料或外界环境介电常数的增大而增大,散射共振峰也有类似的移动规律.利用电子杂化效应和相位延迟效应对该现象进行了理论解释.
The geometrical parameters of the gold nanoshells and the influence of the physical parameters on the wavelength tuning characteristics of the local surface plasmon resonance have been studied theoretically.The results show that the extinction for the spherical shell resonates first with the thickness increasing After redshift and high-order peak steering, the corresponding shell thickness is larger than the low-order peak, and the ratio of the thickness to the inner diameter of the spherical shell decreases with the increase of the inner diameter. With the increase of the dielectric constant of the inner core material or the external environment The phenomenon of increase and scattering resonance also has a similar movement rule, and the phenomenon is theoretically explained by using the electron hybridization effect and the phase delay effect.