Complementary grating dynamics in photorefractive polymers with Alq 3

Cory W. Christenson, Jayan Thomas, Pierre Alexandre Blanche, Ram Voorakaranam, Robert A. Norwood, Michiharu Yamamoto, N. Peyghambarian

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


The electron transporting molecule tris(8-hydroxyquinoline) aluminum (Alq3) was introduced into a photorefractive composite in a low density to study the effects of electron traps on the performance. Compared to a control sample, Alq3 samples exhibited higher dielectric strength, over-modulation at reduced voltage, and increased writing speed. Transient measurements indicated grating revelation via decay of a competing grating. The dynamics are consistent with a bipolar charge transport model. Overall, Alq 3 improves the sensitivity, trapping, and breakdown voltage without significant losses in absorption or phase stability.

Original languageEnglish (US)
Title of host publicationOrganic Photonic Materials and Devices XII
StatePublished - 2010
EventOrganic Photonic Materials and Devices XII - San Francisco, CA, United States
Duration: Jan 26 2010Jan 28 2010

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherOrganic Photonic Materials and Devices XII
Country/TerritoryUnited States
CitySan Francisco, CA


  • Competing gratings
  • Holography
  • Photorefractive polymers

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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