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Low-Toxicity Photopolymer for Reflection Holography
D Cody1, S Gribbin1, E Mihaylova2
1Centre for Industrial and Engineering Optics, Dublin Institute of Technology , Dublin 8, Ireland.
ACS Applied Materials & Interfaces
|July 9, 2016
Summary
This study introduces a novel, low-toxicity photopolymer for creating bright holographic reflection gratings. A unique chemical combination significantly enhances holographic recording ability, improving performance for holographic applications.
Area of Science:
- Photopolymer science
- Holography
- Materials science
Background:
- Photopolymers are crucial for holographic data storage and display.
- Existing materials often face limitations in toxicity, solubility, or recording efficiency.
- Diacetone acrylamide (DA)-based photopolymers offer a promising base but require optimization.
Purpose of the Study:
- To develop a novel, low-toxicity, water-soluble holographic photopolymer.
- To enhance the holographic recording ability of DA-based photopolymers.
- To characterize the performance of the new material for reflection holography.
Main Methods:
- Formulation of a novel photopolymer composition using a chain transfer agent and a free radical scavenger.
- Characterization of diffraction efficiency dependence on spatial frequency, recording intensity, exposure energy, and wavelength.
- Investigation of UV postexposure for improving hologram stability.
- Demonstration of Denisyuk hologram recording and viewing.
Main Results:
- Achieved diffraction efficiency up to 50% for bright reflection gratings.
- Enhanced holographic recording ability of DA-based photopolymer by 3-fold.
- Demonstrated improved stability of photopolymer-based reflection holograms using UV postexposure.
- Successfully recorded Denisyuk holograms viewable under various lighting conditions.
Conclusions:
- The novel photopolymer composition offers a significant advancement in low-toxicity holographic materials.
- The optimized material demonstrates superior holographic recording performance and stability.
- This development enables brighter, more stable holograms for diverse applications.
