Geometrical Dependent Local Filed Enhancement Factor and Optical Induced Bistability of ZnO@Ag Core-Shell Nanocomposite
Keywords:
Zinc Oxide, Silver, Interfacial Layer, Optically induced bistability (OIB), Plasmonic nanocomposites, Local field enhancementAbstract
In this study, the author investigated the local field enhancement factor and optically induced bistability (OIB) in spherical and cylindrical ZnO@Ag core–shell nanostructures embedded in a linear host matrix, considering the effects of the interfacial layer as well as the shape and size of the inclusions. The author umerically analyzed the influence of the interfacial layer on the local field enhancement factor and on the cubic equation governing the optically induced bistability of the composite material. The interfacial layer factor was taken as positive, zero, or negative, representing dielectric-like, no-interfacial, and metal-like interfacial properties, respectively. For spherical inclusions, the local field enhancement factor decreases for larger positive and negative values of the interfacial layer factor, whereas for cylindrical inclusions, it decreases as the interfacial factor increases. Results show that the interfacial properties, along with the shape and size of the composite, can significantly affect both the optically induced bistable behavior and the local field enhancement. This optimized arrangement and unique bistable behavior in metal composites with small dielectric cores may be promising for various potential applications like optoelectronics and plasmonic.
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