Related Experiment Video
Updated: Jul 9, 2026
09:04
Recording Ultra-Realistic Full-Color Analog Holograms for Use in a Moving Hologram Display
Published on: January 14, 2020
Multilayer holographic recording using a two-color-absorption photopolymer
Katsuhiko Hirabayashi1, Hirohisa Kanbara, Yuhei Mori
1NTT Photonics Laboratories, NTT Corporation, 3-1 Morinosato, Wakamiya, Atsugi-shi, Kanagawa 243-0198, Japan. hira@aecl.ntt.co.jp
Applied Optics
|December 12, 2007
Summary
Researchers created a novel two-color photopolymer for hologram recording using specific dyes and initiators. This material enables sensitive holographic data storage within a multi-layer waveguide structure.
Area of Science:
- Materials Science
- Optics
- Polymer Chemistry
Background:
- Holographic data storage requires sensitive photopolymer materials.
- Two-color absorption offers spatial and temporal control over hologram recording.
Purpose of the Study:
- To develop a sensitive two-color-absorption photopolymer for holographic recording.
- To demonstrate its application in a multi-layer waveguide structure.
Main Methods:
- Simultaneous irradiation with 660 nm interference light and 410 nm gate light.
- Utilizing bis(silyl)pentathiophene as a two-color-photosensitive dye and a radical initiator.
- Fabricating a three-photopolymer-layer waveguide with varying refractive indices.
Main Results:
- Achieved high sensitivity (1.2–3.7 x 10^-9 cm²/mJ) and diffraction efficiency (1–4%) in 25 µm thick layers.
- Demonstrated successful holographic recording in individual layers of the waveguide structure.
- Showcased distinct diffraction patterns written in each photopolymer layer.
Conclusions:
- The developed two-color photopolymer is suitable for sensitive holographic recording.
- The waveguide structure allows for multiplexed holographic data storage.
- This technology holds potential for advanced optical information processing.
