A theoretical study of a plasmonic sensor comprising a gold nano-disk array on gold film with a SiO<sub><b>2</b></sub> spacer

A theoretical study of a plasmonic sensor comprising a gold nano-disk array on gold film with a SiO₂ spacer

Wang Xiangxian^{1, †}, Zhu Jiankai¹, Tong Huan¹, Yang Xudong¹, Wu Xiaoxiong¹, Pang Zhiyuan¹, Yang Hua¹, Qi Yunping²

The RI sensitivity as a function of the period, with the period varying from 600 nm to 900 nm in step sizes of 30 nm. (b) The FOM as a function of the period. (c) The reflection spectra of the composite structure with a period range from 900 nm to 1150 nm, step size of 50 nm, background RI (analyte) of 1.3, and nano-disk diameter of 280 nm.