Recording and retrieving small marks far beyond the optical diffraction limit in a high-speed rotating phase-change optical disk have been investigated by use of a thermoreversible organic thin film as a superresolution mask layer. The organic thin film exhibited significant thermoreversibility and rapid response on laser irradiation. Recorded marks as small as 120 nm in length could be detected by a dynamic disk tester with a laser wavelength of 635 nm and a numerical aperture of 0.6.
© 2001 Optical Society of America
[Optical Society of America ]
(160.4890) Materials : Organic materials
(210.4590) Optical data storage : Optical disks
(210.4770) Optical data storage : Optical recording
(210.4810) Optical data storage : Optical storage-recording materials
Qiying Chen, Junji Tominaga, Liqiu Men, Toshio Fukaya, Nobufumi Atoda, and Hiroshi Fuji, "Superresolution optical disk with a thermoreversible organic thin film," Opt. Lett. 26, 274-276 (2001)