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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 3, Iss. 2 — Feb. 10, 2005
  • pp: 113–115

Read-only memory disk with AgOx super-resolution mask layer

Feng Zhang, Yang Wang, Wendong Xu, Hongren Shi, and Fuxi Gan  »View Author Affiliations


Chinese Optics Letters, Vol. 3, Issue 2, pp. 113-115 (2005)


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Abstract

A novel read-only memory (ROM) disk with an AgOx mask layer was proposed and studied in this letter. The AgOx films sputtered on the premastered substrates, with pits depth of 50 nm and pits length of 380 nm, were studied by an atomic force microscopy. The transmittances of these AgOx films were also measured by a spectrophotometer. Disk measurement was carried out by a dynamic setup with a laser wavelength of 632.8 nm and a lens numerical aperture (NA) of 0.40. The readout resolution limit of this setup was ?/(4NA) (400 nm). Results showed that the super-resolution readout happened only when the oxygen flow ratios were at suitable values for these disks. The best super-resolution performance was achieved at the oxygen flow ratio of 0.5 with the smoothest film surface. The super-resolution readout mechanism of these ROM disks was analyzed as well.

© 2005 Chinese Optics Letters

OCIS Codes
(160.4330) Materials : Nonlinear optical materials
(210.0210) Optical data storage : Optical data storage
(310.0310) Thin films : Thin films

Citation
Feng Zhang, Yang Wang, Wendong Xu, Hongren Shi, and Fuxi Gan, "Read-only memory disk with AgOx super-resolution mask layer," Chin. Opt. Lett. 3, 113-115 (2005)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-3-2-113


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