High data-rate phase-change media for the digital video recording system

Benno Tieke, Martijn Dekker, Nicola Pfeffer, Roel Van Woudenberg, Guo Fu Zhou, Igolt P.D. Ubbens

Research output: Contribution to journalArticleAcademicpeer-review

42 Citations (Scopus)

Abstract

The digital video recording (DVR) system combines a high numerical aperture (NA = 0.85) with a thin cover layer to achieve higher storage capacities in optical recording. In addition to capacity, the data-rate is a key parameter for DVR and a major challenge in research on phase-change materials. Using Ge2Sb2Te5 as the phase-change material, we demonstrate recording using a red laser diode (λ = 650 nm) at a user data-rate of 33 Mbps and a capacity of 9.2 GB for a single layer disc of 12 cm diameter, i.e. completely satisfying all the DVR system requirements. In addition, we achieved data-rates of up to 50 Mbps by applying a different stack design. Furthermore, we extend DVR to the blue-violet wavelength region. Using a GaN laser diode (λ = 400 nm) in our recording set up, a capacity of 21.5 GB was achieved at a data-rate of 28 Mbps.

Original languageEnglish
Pages (from-to)762-765
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1 : Regular Papers and Short Notes & Review Papers
Volume39
Issue number2 B
Publication statusPublished - 1 Dec 2000
Externally publishedYes

Keywords

  • Blue laser
  • DVR
  • Ge-Sb-Te
  • High NA
  • Nucleation enhancement
  • Optical recording system
  • Phase-change recording
  • Rewritable
  • Thin cover
  • Video recording system

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