Hybrid assembly of double nanofilm as active media for photonic devices

► Bottom-up process: Ag+ thermal reduction, nucleation, migration of nanoparticles. ► Roughness-controllable silver metallic nanostructure surface. ► XPS as a smart powerful tool for characterization of hybrid systems. ► Double nanofilm-photonic complex and metallic nanostructures self-formed. ► Europium (Eu3+) luminescence decrease in roughness function.