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Keywords:

  • Azopolymers;
  • Holographics;
  • Photorefractive materials

Photorefractive polymeric nanosized dispersions of crystalline materials with high dynamic range have been developed using controlled phase-separation techniques. Orientational birefringence is induced by internal electric fields via the dielectric anisotropy of crystalline domains, rather than through the usual reorientation of molecular dipoles. This more efficient mechanism can increase photorefractive performance by two orders of magnitude and can in principle be applied to optimize other materials for a variety of applications, including medical imaging and image processing.