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Keywords:

  • liquid crystals;
  • holographic materials;
  • H-PDLC;
  • photopolymers;
  • phase separation materials
Thumbnail image of graphical abstract

A one-step fabrication method has been developed to realize graded holographic photopolymer reflection gratings with gradually varied period in the lateral direction, leading to a rainbow-colored reflection image in the same viewing angle. This low-cost rainbow-colored filter can be integrated with detectors or imaging devices to realize compact and portable spectroscopic analyzers.