Kovanzhi P. Optical properties of thin metal amorphous films and coatings

In this work presents the development and analysis of high-performance plasmonic devices based on HfO2/Cu(Ag) structures with and without additional graphene monolayers. The study shows that the integration of graphene monolayers with HfO2/Cu(Ag) structures leads to a significant improvement in plasmonic properties, thermal and chemical stability compared to single-layer Ag or Cu films. High-quality Cu(Ag) films with the addition of a thin dielectric layer of graphene show improved dispersion properties and optical conductivity, supported by experimental data consistent with the Drude free electron model. This structure optimisation allows to effectively modify the electronic characteristics of the hybrid nanostructure, providing high quality surface plasmon resonances (SPR) and a longer plasmon polariton (SPP) propagation length. The obtained results indicate a significant potential of three-layer graphene/HfO2/Ag structures for biosensing applications.