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 journalArticle

27 Citations (Scopus)

Abstract

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
Volume38
Issue number29
DOIs
Publication statusPublished - 1999 Oct 10

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Polarization-multiplexed optical memory with urethane–urea copolymers'. Together they form a unique fingerprint.

  • Cite this

    Alasfar, S., Ishikawa, M., Kawata, Y., Egami, C., Sugihara, O., Okamoto, N., Tsuchimori, M., & Watanabe, O. (1999). Polarization-multiplexed optical memory with urethane–urea copolymers. Applied optics, 38(29), 6201-6204. https://doi.org/10.1364/AO.38.006201