Titanium adhesion layer influence on the formation of hybrid lattice plasmon structures via laser-direct writing

Abstract

The field of nanotechnology is attracting increasing attention due to the successful use of nanostructures in sensor fabrication and the development of new optical devices. Various lithography techniques can be employed to produce nanostructures, but the most recent technique, laser-direct writing, provides efficient and precise control over structural parameters, which is crucial for achieving and optimizing optimal plasmonic properties. In this work, plasmonic structures were formed on a thin gold surface using adhesive titanium layers of different thicknesses, which improve the adhesion between the gold coating and the substrate. The plasmonic properties of the formed structures were assessed to determine the influence of the titanium layer on the quality of plasmonic resonance. The plasmonic structures formed with the titanium adhesion-enhancing layer exhibited high-quality values of plasmonic resonances comparable to those of the structures without the adhesion layer. This property is particularly relevant for the development of plasmonic sensors, as increased adhesion of laser-induced structures increases the durability of this type of sensors.