A simulation of magneto-optical signals in near-field recording

被引：15

作者：

Saito, K ^{[1
]}

Nakaoki, A ^{[1
]}

Kaneko, M ^{[1
]}

机构：

[1] Sony Corp, Giga Byte Labs, Shinagawa Ku, Tokyo 1410001, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1999年 / 38卷 / 12A期

关键词：

MO; MTF; near field; solid immersion lens; air gap; plane wave expansion; Fourier modal method; vector diffraction theory;

D O I：

10.1143/JJAP.38.6743

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The diffraction from two-dimensional magneto-optical marks has been calculated using the plane wave expansion method and the Fourier modal method. The modulation transfer function (MTF) in near field magneto-optical recording has been simulated for the first time on the basis of the strict vector diffraction theory. The simulated result proved that the magneto-optical signal is reduced by only 3 dB at a spatial frequency of NA/lambda, for an air gap of 50 nm between a solid immersion lens with an effective numerical aperture (NA) of 1.5 and a magneto-optical disk surface.

引用

页码：6743 / 6749

页数：7

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