Super-Resolution Optical Disc with High Readout Stability Using a Zinc Oxide Thin Film

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概要

• 論文の詳細を見る

• We report a new super-resolution read-only-memory (ROM) disc with high readout stability using a zinc oxide (ZnO) thin film. A ZnO film utilized in our experiment showed a change in optical constant depending on temperature. By applying this characteristic to a ROM disc, we obtained a linear bit density two times higher than that of conventional ROM discs in our experimental optical pickup system with a 408-nm-wavelength laser and a 0.65-numerical-aperture (NA) objective lens. The readout stability was improved by employing a Si film. A high readout cyclability of more than $1.0\times 10^{5}$ was obtained. Moreover, the super-resolution readout function was confirmed in another optical pickup system with a 408-nm-wavelength laser and a 0.85-NA objective lens.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2004-07-15

著者

• Takamori Nobuyuki

  Devices Technology Research Laboratories, Corporate R&D Group, SHARP Corporation, 2613-1 Ichinomoto-cho, Tenri, Nara 632-8567, Japan

• Takamori Nobuyuki

  Devices Technology Research Laboratories, Corporate R&D Group, Sharp Corporation, 2613-1 Ichinomoto-cho, Tenri-shi, Nara 632-8567, Japan

• Yamamoto Masaki

  Devices Technology Research Laboratories, Corporate R&D Group, SHARP Corporation, 2613-1 Ichinomoto-cho, Tenri, Nara 632-8567, Japan

• TAKAHASHI Akira

  Devices Technology Research Laboratories, Sharp Corporation

• Mori Go

  Devices Technology Research Laboratories, Corporate R&D Group, SHARP Corporation, 2613-1 Ichinomoto-cho, Tenri, Nara 632-8567, Japan

• Tajima Hideharu

  Devices Technology Research Laboratories, Corporate R&D Group, SHARP Corporation, 2613-1 Ichinomoto-cho, Tenri, Nara 632-8567, Japan

• Tajima Hideharu

  Devices Technology Research Laboratories, Corporate R&D Group, Sharp Corporation, 2613-1 Ichinomoto-cho, Tenri-shi, Nara 632-8567, Japan

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• Energy-Gap-Induced Super-Resolution (EG-SR) Optical Disc Using ZnO Interference Film
• Super-Resolution Optical Disc with High Readout Stability Using a Zinc Oxide Thin Film

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