Two-way holographic image storage in photosensitive polymers

Yasuo Aoshima, Chikara Egami, Yoshimasa Kawata, Okihiro Sugihara, Masaaki Tsuchimori, Osamu Watanabe, Yanlong Che, Hisashi Fujimura, Naomichi Okamoto

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We report two-way holographic image storage in azo polymers. Urethane-urea copolymers involve two photochemical reactions, photoanisotropic modification and surface modification. We can realize the recording of two holograms(polarization volume hologram due to the anisotropy of azo side chain and surface relief hologram) that have different types of information. This is possible because the polarization volume hologram is rewritable while the surface relief hologram is thermally stable. Using the fact that the polarization volume hologram acts like a half wave plate, we can separately readout the different types of information.

Original languageEnglish
Pages (from-to)1619-1623
Number of pages5
JournalJapanese Journal of Applied Physics, Part 2: Letters
Issue number3 B
Publication statusPublished - 2001
Externally publishedYes


  • Cis-trans photoisomerization
  • Holographic image storage
  • Optical memory
  • Surface relief hologram
  • Urethane-urea copolymer

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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