Design of Gold Nanohole Arrays for Surface Plasmon Resonance Biosensing

Abstract

A study of the geometry effects of a SPR device based on a gold array of nanoholes has been done. Firstly, we obtained the dependence between the SPR peak position with the period, the hole’s size and the thickness of the gold film. All this for two types of hole: circular and square shapes. Furthermore, we have simulated the effect of the refractive index of the medium on the reflection spectrum. Effectively, little changes in the refractive index provoke a shift in the SPR peak. It’s the result we expected, because there are many devices based on calculating these changes on the medium through the reflection spectra obtained