Potential of Ge-Sb-Te phase-change optical disks for high-data-rate recording

Achieving disk overwrite at a high-data-rate depends on increasing both the disk revolving speed and recording bit density. This work was done to estimate the possible data transferringrates that can be expected in the nearfuture. It is projected that combining the typical phase-change material GeSb-Te and a ''thermally-balanced structure'' to decrease over-write distortion, several 10Mbps will soon be obtained by a red laser and more than 100Mbps will be obtained by a blue laser.