title: Obstructive micro diffracting structures as an alternative to plasmonics nano slits for making efficient microlenses.
abstract: Miniature optical components at the wavelength scale remain today a theoretically opened challenging problem of great technological interest. Appart from refractive micro-optics, plasmonics have been proposed to realize micro lenses with properly designed planar metallic nano-patterns. We show in this paper that efficient light focusing at the diffraction limit with higher transmission can be obtained with micro-structures much easier to fabricate than nano ones, such as a simple micro-slit studied here as an example. Optical properties are attributed to diffraction and a quantitative excellent agreement between experiment and theory is obtained.
authors.affiliation: IMEP-LAHC, Minatec, Grenoble-INP, CNRS- UMR 5130, Grenoble, France. guy.vitrant@minatec.grenoble-inp.fr
authors.forename: Guy
authors.initials: G
authors.lastname: Vitrant
authors.forename: Soraya
authors.initials: S
authors.lastname: Zaiba
authors.forename: Benyamin Y
authors.initials: BY
authors.lastname: Vineeth
authors.forename: Timothe
authors.initials: T
authors.lastname: Kouriba
authors.forename: Omar
authors.initials: O
authors.lastname: Ziane
authors.forename: Olivier
authors.initials: O
authors.lastname: Stéphan
authors.forename: Jocelyne
authors.initials: J
authors.lastname: Bosson
authors.forename: Patrice L
authors.initials: PL
authors.lastname: Baldeck
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D006801:Humans; D007909:Lenses; D008027:Light; D049329:Nanostructures / Q000737:chemistry*; D055096:Optical Devices; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000295:instrumentation*