This project will develop a computational tool to study how light interacts with layered optical materials, with a focus on plasmonic systems. The method builds on the well-established Transfer Matrix Method (TMM) but uses a more stable formulation based on scattering matrices, allowing faster and more reliable calculations than conventional simulation approaches such as FDTD. Undergraduate team members will gain experience in coding, numerical modeling, and scientific visualization while contributing directly to a research tool that can predict key optical properties such as reflection, transmission, and absorption.