title: Engineering a square truncated lattice with light's orbital angular momentum.
abstract: We engineer an intensity square lattice using the Fraunhofer diffraction of a Laguerre-Gauss beam by a square aperture. We verify numerically and experimentally that a perfect optical intensity lattice takes place only for even values of the topological charge. We explain the origin of this behavior based on the decomposition of the patterns. We also study the evolution of the lattice formation by observing the transition from one order to the next of the orbital angular momentum varying the topological charge in fractional steps.
authors: Optics and Materials Group – OPTMA, Universidade Federal de Alagoas, Caixa Postal 2051, Maceió, AL 57061-970, Brazil.
authors: Pedro H F
authors: PH
authors: Mesquita
authors: Alcenísio J
authors: AJ
authors: Jesus-Silva
authors: Eduardo J S
authors: EJ
authors: Fonseca
authors: Jandir M
authors: JM
authors: Hickmann
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D004738:Engineering / Q000379:methods; D004867:Equipment Design; D005583:Fourier Analysis; D008027:Light; D008422:Materials Testing; D008962:Models, Theoretical; D055095:Optics and Photonics; D012031:Refractometry