The paper studies on tunable localized surface plasmon resonance (LSPR) of core /shell silver -sphere nanostruc-tures with DDA (Discrete -dipole approximation) and Plasmon hybridization theory.It denotes that the LSPR is red -shifted with bigger dielectric value and core size.The results show that it is efficient to tune LSPR by core /shell structures.% 利用离散偶极子理论数值模拟了核/壳结构纳米银球局域表面等离子体共振调谐特性,并应用等离子体杂化理论对其数值结果进行了解释。研究结果表明:对于固定的球壳结构,当改变内核介质的介电常数与内核结构尺寸时,其等离子体共振峰发生了明显的移动现象;对于固定的内核结构,当外核厚度变化时能有效实现共振峰的调控。
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