Effect of the Photosensitizer on the Photorefractive Effect Using a Low Tg Sol-Gel Glass

Dong Hoon Choi, Woong Gi Jun, Kwang Yong Oh, Han Na Yoon, Jae Hong Kim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We prepared the photorefractive sol-gel glass based on organic-inorganic hybrid materials containing a charge transporting molecule, second-order nonlinear optical (NLO) chromophore, photosensitizer, and plasticizer. Carbazole and 2-{4-[(2-hydroxy-ethyl)-methyl-amino]-benzylidene}-malononitrile were reacted with isocyanatotriethoxy silane and the functionalized silanes were employed to fabricate the efficient photorefractive media including 2,4,7-trinitrofluorenone (TNF) to form a charge transfer complex. The prepared sol-gel glass samples showed a large net gain coefficient and high diffraction efficiency at a certain composition. As the concentration of photosensitizer increased, the photorefractive properties were enhanced due to an increment of charge carrier density. Dynamic behavior of the diffraction efficiency was also investigated with the concentration of the photosensitizer.

Original languageEnglish
Pages (from-to)250-255
Number of pages6
JournalMacromolecular Research
Volume11
Issue number4
DOIs
Publication statusPublished - 2003 Aug

Keywords

  • Degenerated four wave mixing
  • Diffraction efficiency
  • Gain coefficient
  • Photorefractivity
  • Sol-gel
  • Two-beam coupling

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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