Dynamics of grating formation in photorefractive sol-gel composites

Dong Hoon Choi, Hyeon Taik Hong, Woong Gi Jun, Kwang Yong Oh

Research output: Contribution to journalArticle

10 Citations (Scopus)


We prepared the photorefractive composite based on organic-inorganic hybrid materials containing a charge transporting molecules, second-order nonlinear optical chromophore, photosensitizer, and plasticizer either as a side chain unit or a guest molecule. Carbazole group and 2-{4-[(2-hydroxy-ethyl)-methyl-amino]-benzylidene}-malononitrile were reacted to isocyanatotriethoxysilane to provide the functional precursor molecules. 2,4,7-Trinitrofluorenone was added into the sol-gel materials to induce a charge transfer complex. We also could select the plasticizer that is well miscible with the matrix molecules. Strong hydrogen bond between the molecules was quite effective to control the optical quality of the resultant matrix. We also compared the dynamic properties of the diffraction efficiency in the sol-gel sample with the change of the concentration of each component.

Original languageEnglish
Pages (from-to)373-377
Number of pages5
JournalOptical Materials
Issue number1-3
Publication statusPublished - 2003 Jan 1
Externally publishedYes



  • Diffraction efficiency
  • Holographic grating formation
  • Photorefractive composite
  • Sol-gel

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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