title: Planar lenses based on nanoscale slit arrays in a metallic film.
abstract: 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.
authors.affiliation: E. L. Ginzton Laboratory, Geballe Laboratory for Advanced Materials (GLAM), Stanford University, Stanford, California 94305, USA.
authors.forename: Lieven
authors.initials: L
authors.lastname: Verslegers
authors.forename: Peter B
authors.initials: PB
authors.lastname: Catrysse
authors.forename: Zongfu
authors.initials: Z
authors.lastname: Yu
authors.forename: Justin S
authors.initials: JS
authors.lastname: White
authors.forename: Edward S
authors.initials: ES
authors.lastname: Barnard
authors.forename: Mark L
authors.initials: ML
authors.lastname: Brongersma
authors.forename: Shanhui
authors.initials: S
authors.lastname: Fan
mesh_terms: D017076:Computer-Aided Design; D003460:Crystallization / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007909:Lenses; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008567:Membranes, Artificial; D008670:Metals / Q000737:chemistry*; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000295:instrumentation* / Q000379:methods; D010316:Particle Size; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013499:Surface Properties
chemical_list: D046911:Macromolecular Substances; D008567:Membranes, Artificial; D008670:Metals