High density magneto-optical recording using solid immersion lens with magnetic field modulation

Author

Sbiaa, R. ; Stavrou, E. ; Chekanov, A. ; Birukawa, M. ; Itoh, Y. ; Suzuki, T.

Author_Institution

Toyota Technol. Inst., Nagoya, Japan

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

2276

Lastpage

2278

Abstract

A near field optical technique based on combined supersphere solid immersion lens (SIL) with magnetic field modulation (MFM) recording is described. A better resolution is achieved by using SIL with MFM recording in comparison with light intensity modulation. A recorded mark as small as 0.3 μm×0.2 μm could successfully be detected. These marks were readout by the SIL head with a typical signal to noise ratio value of 36 dB. The present study demonstrates the capability to achieve a very high areal density beyond 20 Gb/in²

Keywords

intensity modulation; lenses; magneto-optical recording; enhanced resolution; high density magneto-optical recording; light intensity modulation; magnetic field modulation; near field optical technique; recording sensitivity; solid immersion lens; supersphere SIL; very high areal density; Intensity modulation; Lenses; Magnetic fields; Magnetic force microscopy; Magnetic modulators; Magnetooptic recording; Optical modulation; Optical recording; Signal resolution; Solids;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908392

Filename

908392