激光与光电子学进展, 2015, 52 (5): 051601, 网络出版: 2015-04-20
基底折射率对金银复合纳米阵列的制备及光学性能的影响 下载: 540次
Effect of Refractive Index of Substrate on Fabrication and Optical Properties of Hybrid Au-Ag Triangular Nanoparticle Arrays
复合纳米阵列 基底折射率 离散偶极子近似 纳米球刻蚀 hybrid Au-Ag nanoparticles substrate refractive index discrete dipole approximation nanosphere lithography
摘要
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。
Abstract
Based on the substrate of silica and different types of slides, the effect of refractive index of substrate on fabrication and optical properties of hybrid Au- Ag triangular periodic nanoparticle arrays is systematically investigated. The optical spectrum of localized surface plasmon resonance (LSPR) simulated by discrete dipole approximation (DDA) numerical method shows that the nanoparticle arrays can obtain better refractive index sensitivity (RIS) and figure of merit (FOM), when refractive index of substrate is 1.43 and 1.68, respectively. The nanosphere lithography (NSL) is used to fabricate the periodic nanostructure arrays. The experimental results demonstrate that when refractive index of substrate is 1.43 and 1.68, nanoparticles and substrate have better adhesive ability. Meanwhile, the nanoparticles both form a large-scale monolayer array with the hexagonally close-packed structure.
叶文才, 贺小猛, 林子杰, 陈惠滨, 刘璟, 蔡豪原, 蔡泽龙, 李昌伟. 基底折射率对金银复合纳米阵列的制备及光学性能的影响[J]. 激光与光电子学进展, 2015, 52(5): 051601. Ye Wencai, He Xiaomeng, Lin Zijie, Chen Huibin, Liu Jing, Cai Haoyuan, Cai Zelong, Li Changwei. Effect of Refractive Index of Substrate on Fabrication and Optical Properties of Hybrid Au-Ag Triangular Nanoparticle Arrays[J]. Laser & Optoelectronics Progress, 2015, 52(5): 051601.