論文

査読有り
2009年3月

High-Density Recording with a Near-Field Optical Disk System Using a Medium with a Top Layer of High Refractive Index

JAPANESE JOURNAL OF APPLIED PHYSICS
  • Tsutomu Ishimoto
  • ,
  • Ariyoshi Nakaoki
  • ,
  • Kimihiro Saito
  • ,
  • Takeshi Yamasaki
  • ,
  • Tomomi Yukumoto
  • ,
  • Sunmin Kim
  • ,
  • Takao Kondo
  • ,
  • Takeshi Mizukuki
  • ,
  • Osamu Kawakubo
  • ,
  • Miwa Honda
  • ,
  • Noriyasu Shinohara
  • ,
  • Norihiko Saito

48
3
開始ページ
03A015-1
終了ページ
03A015-6
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1143/JJAP.48.03A015
出版者・発行元
JAPAN SOCIETY APPLIED PHYSICS

A near-field optical technology using a solid immersion lens (SIL) has been actively studied to expand the storage capacity higher than 100 Gbytes per layer in a 12-cm-sized optical disk. However, the working distance of an objective lens in a near-field optical disk system should only be 25 nm or less. Therefore, from the practical viewpoint, a topcoat layer is required to protect the recording layer when the SIL collides with a disk surface because of disturbances such as dust, shock and vibration. From a mechanical viewpoint, the topcoat should have the mechanical toughness to protect the disk surface. Moreover, from an optical viewpoint, it should have refractive index higher than the numerical aperture of an SIL to achieve a sufficient evanescent couple between the SIL and disk surface. In this study, we describe a topcoat for a near-field optical recording. First, we investigate the topcoat performance from the optical viewpoint. Second, we evaluate the topcoat performance from a mechanical viewpoint. Finally, we report the results of recording experiments for a disk with the topcoat and discuss its performance. (C) 2009 The Japan Society of Applied Physics

Web of Science ® 被引用回数 : 19

リンク情報
DOI
https://doi.org/10.1143/JJAP.48.03A015
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000266115700016&DestApp=WOS_CPL

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