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

被引：11

作者：

Shinoda, M ^{[1
]}

Saito, K ^{[1
]}

Ishimoto, T ^{[1
]}

Kondo, T ^{[1
]}

Nakaoki, A ^{[1
]}

Furuki, M ^{[1
]}

Takeda, M ^{[1
]}

Yamamoto, M ^{[1
]}

机构：

[1] Sony Corp, Dev Grp AVIT, Opt Disc Dev Div, Shinagawa Ku, Tokyo 1410001, Japan

来源：

OPTICAL DATA STORAGE 2003 | 2003年 / 5069卷

关键词：

optical disc; high density; near field; solid immersion lens; numerical aperture; Bi4Ge3O12; refractive index; blue laser; optical pick-up; electron beam recording;

D O I：

10.1117/12.533118

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have achieved high density near field readout of a 100 GB capacity (69.5 Gbit/in(2)) disc by using a solid immersion lens with numerical aperture of 2.05. In order to realize the solid immersion lens with 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 wavelength of 405 run. 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.

引用

页码：306 / 311

页数：6

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