Control of optical properties of metal-dielectric planar plasmonic nanostructures by adjusting their architecture in the case of TiAlN/Ag system

13th International Conference on Films and Coatings

Wainstein, D.L.^1 ; Vakhrushev, V.O.^1,2 ; Kovalev, A.I.^1

Surface Phenomena Researches Group, I. P. Bardin Central Research Institute for Ferrous Metallurgy, 23/9, bdg. 2 Radio str., Moscow

105005, Russia^1

Moscow Technological University (MIREA), 78 Vernadsky Avenue, Moscow

3119454, Russia^2

关键词: Characteristic energy;    Coatings structure;    Dc magnetron sputtering;    Metal insulator metals;    Photovoltaic energy conversion;    Plasmon microscopy;    Plasmonic nanostructures;    Surface distributions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/857/1/012054/pdf
DOI  :  10.1088/1742-6596/857/1/012054

来源: IOP

【 摘 要 】

The multilayer Ag/(Ti34Al66)N metal-insulator-metal (MIM) heterostructures with different thicknesses of individual layers varied from several to several hundred nanometers were fabricated by DC-magnetron sputtering on the surfaces of Si single crystal wafers. The coatings structure was determined by STEM. The phase composition and crystallography of individual layers were studied by X-ray diffraction. The reflection indexes were measured in the photons energies range from 1 to 5 eV, or from 1240 to 248 nm. The spectroscopy of plasmon losses and plasmon microscopy allowed us to measure the plasmons losses characteristic energies and their surface distribution. The energies of plasmons peaks and their locations are strongly depending on Ag layers thickness in the MIM nanocomposite. The surface plasmon with energy about 4 eV was observed in the middle of 20 nm Ag layer. The plasmons were localized at the metal/dielectric interface for Ag layers 5 nm and less. The reflectance spectral profiles edges positions at long and short waves are correlated with plasmons energies and features of their spatial distribution. The MIMs based on the TiAlN/Ag can find applications as optical filters, photovoltaic energy conversion devices, etc.