Abstract
Plasmon resonance heterogeneities were identified and studied along Ag and TiAlN layers within a multilayer stack in nanolaminate TiAlN/Ag coatings. For this purpose, a high-resolution plasmon microscopy was used. The plasmons intensity, energy, and depth of interface plasmon-polariton penetration were studied by scanning reflected electron energy loss spectroscopy. The heat conductivity of such metal-insulator-metal (MIM) nanolaminate coatings was measured by laser reflectometry. Dependencies of thermal conductivity coefficient of coatings, MIM interfaces, and resistivity of Ag layers as a function of the Ag-TiAlN bilayer thickness were calculated on the basis of experimental data. The contribution of plasmon resonance confinement to the abnormal lower thermal conductivity in the MIM metamaterial with Ag layer thickness below 25 nm is discussed. In particular, the results highlight the relevant role of different heat transfer mechanisms between MI and IM interfaces: asymmetry of plasmon-polariton interactions on upper and lower boundaries of Ag layer and asymmetry of LA and TA phonons propagation through interfaces.
Highlights
Multilayer coatings of metal-insulator-metal (MIM) stacks result in 2D or 3D heterophase thin film composites that can be described as planar metamaterials
According our data presented in[26], the electronic structure of Ag coatings. Silver (Ag) layers is transformed in the nanometer range of thicknesses
Asymmetry of transboundary phonon heat transfer is an additional driving force weakening thermal conductivity in multilayer MIM coatings as it depends on a combination of many factors
Summary
Multilayer coatings of metal-insulator-metal (MIM) stacks result in 2D or 3D heterophase thin film composites that can be described as planar metamaterials. The processes of light transmission and heat transfer in solids have common physical mechanisms that include propagation of phonon and plasmon oscillations in nanolayers and plasmon-polariton interactions at interfaces. These laminated materials present a multifunctional character by combining thermal barrier and optical properties. The present research overrides difficulties of these models using plasmon microscopy In this context, the main consideration is given to size effects and influence of interfaces onto plasmonic contribution in heat transfer of MIM coating. Such coatings are expected to be used as anti-reflecting wear resistant ones in solar energy applications
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
