High Data-Rate Phase-Change Media for the Digital Video Recording System

概要

論文の詳細を見る
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 Ge_2Sb_2Te_5 as the phase-change material, we demonstrate recording using a red laser diode(λ=650nm) at a user data-rate of 33Mbps and a capacity of 9.2GB for a single layer disc of 12cm diameter, i.e.completely satisfying all the DVR system requirements. In addition, we achieved data-rates of up to 50Mbps by applying a different stack design. Furthermore, we extend DVR to the blue-violet wavelength region. Using a GaN laser diode(λ=400nm) in our recording set up, a capacity of 21.5GB was achieved at a data-rate of 28Mbps.
社団法人応用物理学会の論文
2000-02-28