Electric-field stabilization and competition of gratings in a photorefractive polymer

Stephen Ducharme, James M. Takacs, Lei Zhang, Brian Jones

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Abstract

We report observations of electric-field stabilization of gratings and grating competition in a new photorefractive polymer mixture composed of 40 wt. % diethylamino-benzaldehyde-diphenyl hydrazone dissolved in Bisphenol A 4,4′-nitroaminotolane. Gratings formed with a 650-nm optical wavelength in 145-μm-thick films at 138-kV/cm bias field have a diffraction efficiency as high as 0.11%, require an energy density of −1 J/cm2 for formation, and show cancellation, revelation, and electric-field-stabilized persistence. We propose a model in which fast recording is associated with one set of photosensitive traps, whereas a slower cancellation and subsequent revelation are associated with a competing grating formed in a set of insensitive shallow traps. The model also accounts for observed fatigue of the photoconductivity.

Original languageEnglish (US)
Pages (from-to)152-154
Number of pages3
JournalOptics Letters
Volume18
Issue number2
DOIs
Publication statusPublished - Jan 15 1993

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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