Three-dimensional optical data storage in vitreous silica

Mitsuru Watanabe, Hongbo Sun, Saulius Juodkazis, Toshimasa Takahashi, Shigeki Matsuo, Yoshihisa Suzuki, Jyunji Nishii, Hiroaki Misawa

研究成果: Article査読

132 被引用数 (Scopus)


To achieve high bit densities (> 10 GB/cm3) in optical memory, we accomplished a three-dimensional optical data storage system using vitreous silica as the recording material. We succeeded in high-density optical recording by focusing pulsed laser beams of 532 nm (full width at half maximum [FWHM] 30 ps) and 400 nm (150 fs). A recording density of 72.9 GB/cm3 was achieved, which corresponded to that of 100 compact disks, on a glass plate of (2 × 2) cm2 and 2.2 mm thickness. We found that the optical damage of silica occurs within 400 ps after irradiation by a single pulse for 30 ps at 532 nm. Three photoluminescence bands were found in the photomodified silica at 283 nm, 468 nm and 558 nm. All the three bands showed similar photoluminescence excitation spectra, i.e. a peak related to oxygen vacancy absorption at 250 nm.

ジャーナルJapanese Journal of Applied Physics, Part 2: Letters
出版ステータスPublished - 1998 12 15

ASJC Scopus subject areas

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

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