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Proceedings Paper

High-density near-field readout over 100-GB capacity using a solid immersion lens with NA of 2.05
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Paper Abstract

We have achieved high density near field readout of a 100 GB capacity (69.5 Gbit/in2) disc by using a solid immersion lens with numerical aperture of 2.05. In order to realize the solid immersion lens wtih numerical aperture of 2.05, the solid immersion lens was made from Bi4Ge3O12 mono-crystal. The refractive index of Bi4Ge3O12 is 2.23 at the wavelegnth of 405 nm. A conventional optical pick-up actuator with the solid immersion lens was used for the near field optical disc system. We confirmed that the near field readout system is promising method of realizing a high density optical disc system.

Paper Details

Date Published: 16 September 2003
PDF: 6 pages
Proc. SPIE 5069, Optical Data Storage 2003, (16 September 2003); doi: 10.1117/12.533118
Show Author Affiliations
Masataka Shinoda, Sony Corp. (Japan)
Kimihiro Saito, Sony Corp. (Japan)
Tsutomu Ishimoto, Sony Corp. (Japan)
Takao Kondo, Sony Corp. (Japan)
Ariyoshi Nakaoki, Sony Corp. (Japan)
Motohiro Furuki, Sony Corp. (Japan)
Minoru Takeda, Sony Corp. (Japan)
Masanobu Yamamoto, Sony Corp. (Japan)

Published in SPIE Proceedings Vol. 5069:
Optical Data Storage 2003
Michael O'Neill; Naoyasu Miyagawa, Editor(s)

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