Energy-Gap-Induced Super-Resolution (EG-SR) Optical Disc Using ZnO Interference Film

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概要

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• We have developed a super-resolution read-only memory (ROM) disc with a high readout stability using a zinc oxide (ZnO) thin film. Applying the reversible and repeatable change in the optical constants of ZnO induced by heat, we can successfully confirm super-resolution effects that can read out a small mark beyond the optical diffraction limit. By realizing this characteristic in a ROM disc, we obtained a linear bit density twofold higher than that of a conventional disc in the blue-laser optical system. To clarify the origin of ZnO super resolution, we performed two types of test: a test to compare ZnO super-resolution characteristics using blue- and red-laser optical systems, and a test to determine the relationship between the absorption edges of semiconductor films with various energy band gaps and readout laser wavelength.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2005-05-15

著者

• Takamori Nobuyuki

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

関連論文

• New Equalizer Optimization Method for Partial Response Maximum Likelihood Systems Using Normal Equation with Sequenced Amplitude Margin
• New Adaptive Equalization Method for Partial Response Maximum Likelihood System Optimizing Error Rate Performance
• 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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