2008/11/21 by Lieven Verslegers, Peter B. Catrysse, Zongfu Yu +4 · 3 citations
Materials Science · Engineering · #Optical Coatings and Gratings #Plasmonic and Surface Plasmon Research #Fluid Dynamics and Thin Films
paper · doi:10.1021/nl802830y
openalex publication_date 2008/11/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/23
We experimentally demonstrate planar lenses based on nanoscale slit arrays in a metallic film. Our lens structures consist of optically thick gold films with micron-size arrays of closely spaced, nanoscale slits of varying widths milled using a focused ion beam. We find excellent agreement between electromagnetic simulations of the design and confocal measurements on manufactured structures. We provide guidelines for lens design and show how actual lens behavior deviates from simple theory.