Dual Plasmonic Modes from In-Situ Silver Nanoparticle Formation via Diffusion at Silver / Dielectric Interfaces

• DOI: 10.48550/arxiv.1904.07343
• Publication Date: 2019-01-01
• Authors: Yufeng Ye; Joel Y. Y. Loh; Andrew G. Flood; Cong Fang; Joshua Chang; Ruizhi Zhao; Peter Brodersen; Nazir P. Kherani
• Keywords: Silver nanoparticle; Localized surface plasmon

Metal-dielectric interfaces of various geometries are fundamental photonic material platforms for surface plasmons. Surface plasmon polaritons and localized plasmons two modes that excited on planar curved metal-dielectric interfaces, respectively. Herein, we demonstrate in-situ formation silver nanoparticles by diffusion at a interface between sputter-deposited nitride dielectrics. In one step, synthesize nanostructure exhibits both resonances the interface. We develop an accurate optical model describing applying effective medium theories to experimental ToF-SIMS XPS depth profiles. Our findings provide insights into intrinsic interfacial defects, along with new nanoparticle synthesis method seamlessly integrates conventional fabrication interfaces. These unique results open prospect promising photonic-plasmonic applications availing coupling modes.