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Title: Super-collimation by axisymmetric photonic crystals

We propose and experimentally show the mechanism of beam super-collimation by axisymmetric photonic crystals, specifically by periodic (in propagation direction) structure of layers of concentric rings. The physical mechanism behind the effect is an inverse scattering cascade of diffracted wave components back into on- and near-axis angular field components, resulting in substantial enhancement of intensity of these components. We explore the super-collimation by numerical calculations and prove it experimentally. We demonstrate experimentally the axial field enhancement up to 7 times in terms of field intensity.
Authors:
; ; ;  [1] ;  [2] ;  [2] ;  [3]
  1. Laser Research Center, Department of Quantum Electronics, Vilnius University, Saulėtekio Ave. 10, LT-10222 Vilnius (Lithuania)
  2. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Colom 11, 08222 Terrassa (Spain)
  3. (ICREA), Pg. Lluís Companys, 23, 08010 Barcelona (Spain)
Publication Date:
OSTI Identifier:
22300072
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 22; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AXIAL SYMMETRY; BEAMS; COLLIMATORS; COMPUTERIZED SIMULATION; CRYSTALS; INVERSE SCATTERING PROBLEM; LAYERS; PERIODICITY; RINGS; WAVE PROPAGATION