FABRICATION OF PERIODIC ARRAYS OF METALLIC NANOHOLES AND THEIR STRUCTURAL AND PLASMONIC PROPERTIES
V. CÂNPEAN, S. AŞTILEAN

Abstract. In this work we implemented a new variant of classical nanosphere lithography that combines the reactive ion etching (RIE) of self-assembled film of polystyrene nanospheres with metal deposition to fabricate gold films with periodic arrays of nanoholes. This method allows us to introduce the control over the array periodicity by choosing the initial diameter of spheres, the metallic hole diameter by RIE etching time as well as the film thickness. The films morphology was characterized by AFM whereas their optical properties were measured using optical fibre microreflectometry and transmission. Our objective is to understand how the structural parameters (hole diameter) interplay onto the plasmonic response of films in order to enhance the light transmission as well as plasmonic local field.