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
收藏
页码：306 / 311
页数：6
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