Transmitted signal detection of optical disks with a superresolution near-field structure

We observed transmitted signals of phase change marks recorded in super-resolution near-field structure (super-RENS) disks under high speed disk rotation. The observed minimum mark size was 81 nm and the carrier to noise ratio was about 6 dB at a constant linear velocity of 4.8 m/s. The mark size wa...

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Bibliographic Details
Published in:Applied physics letters 1999-07, Vol.75 (2), p.151-153
Main Authors: Nakano, Takashi, Sato, Akira, Fuji, Hiroshi, Tominaga, Junji, Atoda, Nobufumi
Format: Article
Language:English
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Summary:We observed transmitted signals of phase change marks recorded in super-resolution near-field structure (super-RENS) disks under high speed disk rotation. The observed minimum mark size was 81 nm and the carrier to noise ratio was about 6 dB at a constant linear velocity of 4.8 m/s. The mark size was far beyond the diffraction limit of an optical pickup with a wavelength of 635 nm and a numerical aperture of 0.6. It was clear that near-field scattering actually occurred in super-RENS disks.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.124302