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Proceedings Paper

Transmissivity comparison of two kinds of SIL for near-field optical storage
Author(s): Wenwei Mao; Shuo Zhang
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Paper Abstract

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 λ), 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 λ, the high-N.A. transmissivity of both is nearly zero.

Paper Details

Date Published: 17 September 2002
PDF: 4 pages
Proc. SPIE 4930, Advanced Optical Storage Technology, (17 September 2002); doi: 10.1117/12.483298
Show Author Affiliations
Wenwei Mao, Tsinghua Univ. (China)
Shuo Zhang, Tsinghua Univ (China)

Published in SPIE Proceedings Vol. 4930:
Advanced Optical Storage Technology
Duanyi Xu; Seiya Ogawa, Editor(s)

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