Polarization-multiplexed optical memory with urethane–urea copolymers

Samer Alasfar, Masahiko Ishikawa, Yoshimasa Kawata, Chikara Egami, Okihiro Sugihara, Naomichi Okamoto, Masaaki Tsuchimori, Osamu Watanabe

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


We present a polarization-multiplexed optical memory with urethane–urea copolymers. The side chains of the urethane–urea copolymers induce cis–trans isomerization by illumination of blue or green light, and they align perpendicular to the linear polarization of the illuminated light, thus producing optical anisotropy. We found that the material showed selective anisotropy for the particular direction that was perpendicular to that of the recording beam polarization. By use of the anisotropic property three different data pages were multiplexed at the same spot of the medium. Erasure of the recorded bit data is also demonstrated.

Original languageEnglish
Pages (from-to)6201-6204
Number of pages4
JournalApplied optics
Issue number29
Publication statusPublished - 1999 Oct 10
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


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