Surface Plasmons Coupling in Multilayer Remote-grating System

Currently, the plasmonic waveguides are able to transmit or to control the optical or electronic signals; the plasmonic device can be used as bio-sensors, both of which have become popular issue. In this research, I simulate and design multilayer remote-grating system by using finite-difference time-domain method. The power flow can perfectly be excited to interface between two dielectric materials by total reflection. Then, it can reach multiple narrow band coupling of surface plasmons, which obtain the functionality of multiple wavelength sensor. SPPs have ability to transmit on the surface of dielectric material with low loss. Hence, I hope that these advantages can be applied to related field in the near future. First, I discuss the relationship between different quasi period arrangements and different thickness of dielectric layer toward the intensity effect of electric field of remote grating system. Afterward, we can get the maxima enhancement by optimizing the parameters as well as investigate the physical mechanism and the reason why I can enhance the electric field intensity. From our simulation analysis, there are two important reason of influencing on coupling frequency that I find different thickness of dielectric layer and different quasi period remote grating arrangements.