Shaping the Nonlinear Emission Pattern of a Dielectric Nanoantenna by Integrated Holographic Gratings
Authors: Ghirardini L., Marino G., Gili V.F., Favero I., Rocco D., Carletti L., Locatelli, A., De Angelis C., Finazzi M., Celebrano M., Neshev D.N., Leo G.
Autors Affiliation: Politecn Milan, Dept Phys, Piazza Leonardo Da Vinci 32, I-20133 Milan, Italy; Univ Paris Diderot, CNRS, Lab Mat & Phenomenes Quant, UMR 7162, 10 Rue A Domon & L Duquet, F-75013 Paris, France; Univ Brescia, Dept Informat Engn, Via Branze 38, I-25123 Brescia, Italy; Natl Inst Opt INO, Via Branze 45, I-25123 Brescia, Italy; Australian Natl Univ, Res Sch Phys & Engn, Nonlinear Phys Ctr, Canberra, ACT 2601, Australia.
Abstract: We demonstrate the shaping of the second-harmonic (SH) radiation pattern from a single AlGaAs nanodisk antenna using coplanar holographic gratings. The SH radiation emitted from the antenna toward the otherwise forbidden normal direction can be effectively redirected by suitably shifting the phase of the grating pattern in the azimuthal direction. The use of such gratings allows increasing the SH power collection efficiency by 2 orders of magnitude with respect to an isolated antenna and demonstrates the possibility of intensity-tailoring for an arbitrary collection angle. Such reconstruction of the nonlinear emission from nanoscale antennas represents the first step toward the application of all-dielectric nanostructures for nonlinear holography.
Journal/Review: NANO LETTERS (PRINT)
Volume: 18 (11) Pages from: 6750 to: 6755
KeyWords: Second harmonic generation; beaming; collection efficiency; nonlinear nanoantennas; gratingsDOI: 10.1021/acs.nanolett.8b02432Citations: 4data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2019-08-25References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here