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

(a) The reflection spectrum of the composite structure, where the period is 720 nm and the diameter of the nano-disks is 280 nm. Simulated electric field | E | / | E 0 | of mode 2 (b) and mode 3 (c) on the xz plane, along the diameter of the nano-disk.