Spot Shape on Super-Resolution Optical Disks with a Photon-Mode Mask Layer |
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| Authors: | Tsuyoshi Tsujioka Masahiro Irie |
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| Affiliation: | (1) New Materials Research Center, SANYO Electric Co., Ltd., Hashiridani 1-18-13, Hirakata Osaka 573-8534, Japan;(2) Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Hakosaki, 6-10-1, Higashi-ku, Fukuoka 812-8581, Japan |
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| Abstract: | The spot shape on super-resolution optical disks with a photon-mode mask layer was theoretically analyzed. The spot shape was found to depend on the lifetime of the bleached state of the dyes, the light power, and the disk rotation speed. When the lifetime is short, the super-resolution spot shape is not produced at high disk speeds. On the other hand, a dye mask layer with long lifetime, such as a photochromic mask, can produce a sharp spot shape in the higher disk speed region, and therefore is suitable for obtaining a super-resolution disk with a high data transfer rate. |
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| Keywords: | optical disk photon-mode photochromism high-density recording super-resolution |
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