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Title: Formation of collimated beams behind the woodpile photonic crystal

We experimentally observe formation of narrow laser beams behind the woodpile photonic crystal, when the beam remains well collimated in free propagation behind the crystal. We show that the collimation depends on the input laser beam's focusing conditions, and we interpret theoretically the observed effect by calculating the spatial dispersion of propagation eigenmodes and by numerical simulation of paraxial propagation model.
Authors:
; ;  [1] ;  [2] ; ; ; ;  [3] ;  [4] ;  [1] ;  [5]
  1. Departament de Fisica i Enginyeria Nuclear, Universitat Politecnica de Catalunya, Colom 11, E-08222 Terrassa, Barcelona (Spain)
  2. Division of Global Research Leaders (Research Institute of Electronics), Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu 432-8561 (Japan)
  3. Laser Research Center, Department of Quantum Electronics, Vilnius University, Sauletekio al 10, LT-10222 Vilnius (Lithuania)
  4. Swinburne University of Technology, Centre for Micro-Photonics, John Street, Hawthorn, VIC 3122 (Australia)
  5. (ICREA), Passeig Lluis Companys, 23, E-08010, Barcelona (Spain)
Publication Date:
OSTI Identifier:
22072178
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 84; Journal Issue: 3; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMPUTERIZED SIMULATION; DISPERSIONS; FOCUSING; INTERFERENCE; LASERS; PHOTON BEAMS