The conductivity effect of the top coating on optical properties of thin Cu(Ag)-layered structures

• DOI: 10.15407/spqeo27.01.095
• Publication Date: 2024-03-19T05:33:41Z
• Authors: P.O. Kovanzhi; I.H. Hyrman; ; V.G. Kravets; ; O.S. Kondratenko; ; L.V. Poperenko
• Keywords: 0210 nano-technology; 0104 chemical sciences

This study examines the optical properties of thin Cu (Ag)-layered structures covered with protective layers based on graphene, titanium (TiO2), or aluminium (Al2O3) oxides. The objective is to investigate impact these coatings behaviors underlying metallic layers, specifically in spectral range excitation surface plasmon resonances. Combining methods spectroreflectometry and spectro-ellipsometry was used analyze characteristics hybrid metal-oxide-graphene films. shows that due its exceptional electrical conductivity unique optoelectronic properties, significantly modifies behavior investigated structures. It includes notable changes refractive absorption indices, indicating potential for enhancing light-matter interactions plasmonic-graphene layered aim apply as biosensor. important addition TiO2 Al2O3 has also strong effects which are relevant their respective applications fields optoelectronics microelectronics. Employing effective medium approximation Tauc–Lorentz model promotes deeper understanding interplay between interband intraband electronic transitions at nanoscale level. revealed layer thickness constituted materials individual dielectric functions together a graphene monolayer commit significance altering obtained results plasmonics nanotechnology, providing insights designing sensors devices improved characteristics.