Abstract

This work reports the effects of film thickness and annealing temperature on pulsed laser deposited silver nanofilms. Structural and optical properties of nanostructures are studied with scanning electron microscopy, energy dispersive analysis of x-ray, x-ray diffraction, and UV-visible spectroscopy. A direct relation is observed between the film thickness and dimensional range of silver nanoparticles that can be produced by annealing. With the increase in annealing temperature, formation of well-separated nanoparticles is promoted. Optical characterization of different samples shows the effective coupling of silver nanoparticles, and surface plasmon resonance is observed over a wide spectrum. Finite-difference time-domain (FDTD)-simulated results illustrate shifts in the plasmon resonance wavelengths due to the combination of different nanoparticle sizes and support experimental findings. This generic study produces a wide range of plasmonic nanostructures and may be extremely useful for various applications.

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