Near-field phase-change optical recording of 1.36 numerical aperture

被引：32

作者：

Ichimura, I ^{[1
]}

Kishima, K ^{[1
]}

Osato, K ^{[1
]}

Yamamoto, K ^{[1
]}

Kuroda, Y ^{[1
]}

Saito, K ^{[1
]}

机构：

[1] Sony Corp, Home Network Co, Dev Ctr, Shinagawa Ku, Tokyo 1410001, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 2000年 / 39卷 / 2B期

关键词：

solid immersion lens (SIL); near-field recording; gap servo; high numerical aperture (NA); phase-change (PC) disk; high-density recording; vector diffraction;

D O I：

10.1143/JJAP.39.962

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A bit density of 125 nm was demonstrated through near-field phase-change (PC) optical recording at the wavelength of 657 nm by using a supersphere solid immersion lens (SIL). The lens unit consists of a standard objective and a phi 2.5 mm SIL. Since this lens size still prevents the unit from being mounted on an air-bearing slider, we developed a one-axis positioning actuator and an active capacitance servo for precise gap control to thoroughly investigate near-field recording. An electrode was fabricated on the bottom of the SIL, and a capacitor was formed facing a disk material. This setup realized a stable air gap below 50 nm, and a new method of simulating modulation transfer function (MTF) optimized the PC disk structure at this gap height. Obtained jitter of 8.8% and a clear eye-pattern prove that our system successfully attained the designed numerical-aperture (NA) of 1.36.

引用

页码：962 / 967

页数：6

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