Characterization of diffraction grating in photorefractive sol-gel glass

H. K. Lee, U. J. Hwang, C. H. Oh, G. J. Lee, Y. P. Lee, W. G. Jun, D. H. Choi

Research output: Contribution to journalArticlepeer-review


The photorefractivity of a sol-gel glass was investigated using two-beam-coupling (TBC), degenerate-four-wave-mixing (DFWM), and phase shifting methods. The sol-gel glass was prepared by introducing the following photorefractive elements in the polyethyleneglycol matrix: TNF, SG-Cz, and SG-MN were used as charge generator, charge transporter, and electrooptic material, respectively. TBC gain of 90 cm-1 and diffraction efficiency of 46% were obtained at 107 V/μm field. Also we measured the grating build-up and relaxation characteristics. The holographic phase shift was measured to be 51° at 107 V/μm field. In order to compare this photorefractive sol-gel glass with inorganic photorefractive crystal, we measured the photorefractive properties of Fe:LiNbO3. As a result, we obtained the TBC gain of 50 cm-1, the diffraction efficiency of 47%, and the phase shift of 90° for Fe:LiNbO3 sample.

Original languageEnglish
Pages (from-to)129-135
Number of pages7
JournalMolecular Crystals and Liquid Crystals
Publication statusPublished - 2004
Externally publishedYes


  • Degenerate four wave mixing
  • Holographic phase shift
  • Photorefractivity
  • Sol-gel glass
  • Two beam coupling

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics


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