Transmissivity comparison of two kinds of SIL for near-field optical storage

被引：0
|
作者：
Mao, WW [1 ]
Zhang, S [1 ]
机构：
[1] Tsing Hua Univ, Dept Precis Instrument & Mechanol, Beijing, Peoples R China
来源：
ADVANCED OPTICAL STORAGE TECHNOLOGY | 2002年 / 4930卷
关键词：
optical storage; SIL; near-field; transmissivity;
D O I：
10.1117/12.483298
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
A solid immersion lens(SIL) using in high-density optical recording works by changing evanescent waves(in the condition of high N.A.) into propagating waves through tunneling effect, and the rays are focused on recording medium. So the transmissivity and the tunnel width is a sharp conflict. The analysis and brief calculation in this paper show that, the transmissivity angular spectrum of hemisphere SIL(HSIL) and super hemisphere SIL(SSIL) is obviously different. When the tunnel width is narrow(about 1/10 lambda), the former(HSIL) has a high transmissivity than the latter(SSIL) only when the N.A. is near the highest. But if the width becomes larger, the transmissivity of SSIL is always better than that of HSIL. And when the width is about 1/2 lambda, the high-N.A. transmissivity of both is nearly zero.
引用
收藏
页码：528 / 531
页数：4
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