Abstract:
The existence of surface plasmon polaritons was first predicted in 1957 by Rufus Ritchie. But at that time its application was unknown. The 2nd birth of SPPs occurred after 1997 when scientists realized that it can be used localize the light signals far beyond the diffraction limit; the limit which is the main hindrance in integration and miniaturization of optical devices. Following the discovery, research in this field has been growing rapidly. SPPs are basically electromagnetic waves which arise from the coupling effect between photons and the free conduction electrons on the interface between a metal and a dielectric. They propagate along the interface. In this thesis, propagation characteristics of Surface Plasmon Polaritons in the single interface of Silver (Ag) and Indium Phosphide (InP) are presented. A three dimensional structure has been designed to analyze the dynamics of the propagation numerically. Lorentz-Drude model is used to model the frequency dependent permittivity of Ag while Lorentz model is used to model InP. The dimensions of Indium Phosphide layer are varied to find an optimum design which grants the highest efficiency. The nano-plasmonic structure yields an efficiency of 59.76%.
Description:
Supervised by Dr. Rakibul Hasan Sagor
Assistant Professor,
Department of Electrical and Electronic Engineering, Islamic University of Technology (IUT), Boardbazar, Gazipur-1704.
