TL;DR: With this paper, the authors noted the plant-mediated synthesis of silver nanoparticles utilizing the plant leaf extract of Coleus aromaticus, which functions to be a reducing and capping agent. Depending on the distinctive Attributes of optical Fano resonance and plasmonic-waveguide coupling methods, this paper explores a novel refractive index https://www.directivepublications.org/journal-of-applied-nanoscience/