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以石英和不同型号的玻片为基底,系统研究了基底折射率对周期性金银复合纳米阵列的制备及其光学性能的影响。采用离散偶极子近似(DDA)数值方法研究了复合阵列的局部表面等离子共振(LSPR)光谱特性,计算结果表明,当基底折射率为1.43和1.68时,纳米阵列的折射率灵敏度(RIS)和品质因子(FOM)比较优异。利用纳米球刻蚀法(NSL)制备了二维周期性复合纳米点阵结构,实验结果表明,当基底折射率为1.43和1.68时,基底与贵金属纳米颗粒有较好的粘合度,纳米阵列结构形貌比较规则清晰。
Based on quartz and different types of slides, the effects of substrate refractive index on the preparation and optical properties of periodic Ag-Ag nanocomposites were systematically investigated. The local surface plasmon resonance (LSPR) spectra of the composite arrays were studied by the discrete-dipole approximation (DDA) method. The calculated results show that when the refractive index of the substrate is 1.43 and 1.68, the refractive index sensitivity (RIS) Quality factor (FOM) more excellent. Two-dimensional periodic composite nano-lattice structures were prepared by using nanosphere etching (NSL). The experimental results show that when the refractive index of the substrates is 1.43 and 1.68, the adhesion between the substrate and the noble metal nanoparticles is better. The nano- Structural morphology is relatively clear rules.