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Title: The photorefractive characteristics of bismuth-oxide doped lithium niobate crystals

Bismuth-doped lithium niobate (LN:Bi) crystals were grown by Czochralski method and their optical damage resistance, photorefraction, absorption spectra, and defect energy levels were investigated. The experimental results indicate that the photorefractive properties of LN:Bi were enhanced as compared with congruent one, the photorefractive response time was greatly shortened, the photorefractive sensitivity was increased, and the diffraction efficiency of near-stoichiometric LN:Bi (SLN:Bi) reached 31.72% and 49.08% at 532 nm and 488 nm laser, respectively (light intensity of 400 mW/cm{sup 2}). An absorption peak at about 350 nm was observed in the absorption spectrum of LN:Bi. And the defect energy levels simulation indicates new defect levels appear in the forbidden gap of LN:Bi crystals. Therefore bismuth can act as photorefractive centers in LN crystals.
Authors:
;  [1] ;  [2] ;  [1] ;  [3] ;  [3] ;  [2] ;  [1] ; ;  [4] ;  [1] ;  [3] ;  [2]
  1. School of Physics, Nankai University, Tianjin 300071 (China)
  2. (Tianjin), Tianjin 300072 (China)
  3. (China)
  4. MOE Key Laboratory of Weak-Light Nonlinear Photonics and TEDA Applied Physics School, Nankai University, Tianjin 300457 (China)
Publication Date:
OSTI Identifier:
22454430
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 1; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION; ABSORPTION SPECTRA; BISMUTH; BISMUTH OXIDES; COMPARATIVE EVALUATIONS; CRYSTALS; CZOCHRALSKI METHOD; DEFECTS; DIFFRACTION; DOPED MATERIALS; EFFICIENCY; ENERGY LEVELS; LITHIUM; NIOBATES; PEAKS; SENSITIVITY; SIMULATION