Dielectric metasurfaces for surface enhanced Raman spectroscopyČernigoj, Jernej (Avtor) Mertelj, Tomaž (Mentor) Surface enhanced Raman spectroscopyenhancement factormetasurfaceMie resonancessurface lattice resonancesfinite element method simulationsI present the use of high refractive index dimers for the realisation of a surface enhanced Raman spectroscopy substrate. The use of low loss dielectric materials is favourable to metallic ones because of their lower light absorption and consequently much lower heating of the substrate. By combining different mechanisms of field enhancement we can overcome the main weakness of dielectric dimers: a low enhancement factor compared to the plasmonic ones. Results of finite element method simulations for two designed structures are presented. The first structure employs a gold mirror for additional field enhancement, while the second one is adapted for easier fabrication. The enhancement factors and absorption of both structures are compared to the plasmonic and other dielectric substrates.20192019-09-25 07:45:03Magistrsko delo/naloga111131sl