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Title: Kolakoski sequence as an element to radiate giant forward and backward second harmonic signals

We propose a novel type of aperiodic one-dimensional photonic crystal structures which can be used for generating giant forward and backward second harmonic signals. The studied structure is formed by stacking together the air and nonlinear layers according to the Kolakoski self-generation scheme in which each nonlinear layer contains a pair of antiparallel 180° poled LiNbO{sub 3} crystal layers. For different generation stages of the structure, conversion efficiencies of forward and backward second harmonic waves have been calculated by nonlinear transfer matrix method. Numerical simulations show that conversion efficiencies in the Kolakoski-based multilayer are larger than the perfect ones for at least one order of magnitude. Especially for 33rd and 39th generation stages, forward second harmonic wave are 42 and 19 times larger, respectively. In this paper, we validate the strong fundamental field enhancement and localization within Kolakoski-based multilayer due to periodicity breaking which consequently leads to very strong radiation of backward and forward second harmonic signals. Following the applications of analogous aperiodic structures, we expect that Kolakosi-based multilayer can play a role in optical parametric devices such as multicolor second harmonic generators with high efficiency.
Authors:
 [1] ;  [1] ;  [2] ; ;  [3]
  1. Physics Department, Shahid Beheshti University, Tehran (Iran, Islamic Republic of)
  2. (Iran, Islamic Republic of)
  3. Laser and Plasma Research Institute, Shahid Beheshti University, Tehran (Iran, Islamic Republic of)
Publication Date:
OSTI Identifier:
22492906
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 18; Other Information: (c) 2015 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; AIR; COMPUTERIZED SIMULATION; CRYSTAL STRUCTURE; CRYSTALS; EFFICIENCY; LAYERS; LITHIUM COMPOUNDS; NIOBATES; NIOBIUM OXIDES; NONLINEAR PROBLEMS; PERIODICITY; SIGNALS; TRANSFER MATRIX METHOD