The Simulation of a Surface Plasmon Resonance Metallic Grating for Maximizing THz Sensitivity in Refractive Index Sensor Application

Figure 1

A schematic diagram of the one-dimensional rectangular metal coated grating where is the grating period, W is the grating width, H is the grating depth, and t_m is the metal thickness. SPR occurs on the metal-dielectric interface when the wave vector of the incident wave () is coupled to the wave vector of surface wave () by the grating.