Tuning of particle plasmon resonances in binary dielectric medium

Using light scattering spectroscopy, I demonstrate an approach to tune particle plasmon resonance in a binary dielectric media where silver nano-rods are embedded partially both in Anodic Aluminum Oxide (AAO) matrix and in air. A systematic experimental study under a controlled variation of the degree of embedding of nano-rods in AAO matrix has been presented. Experimental results have been interpreted based on the Drude model. Finite Difference Time Domain (FDTD) method has been employed to calculate the nature of the silver nano-rod resonance at the experimental conditions. Both the simulation results and theory corroborate the experimental findings. -- Highlights: ► Tuning of particle plasmon resonance of silver nano-rods in a binary dielectric medium. ► Controlled variation of the degree of embedding of nano-rods in anodic aluminum oxide. ► Interpretation of experimental results by the Drude model. ► Comparison with simulated results from finite difference time domain method.