Magneto-optical Imaging by Scanning Near-field Optical Microscope Using Polarization Modulation Technique

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概要

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• A polarization modulation technique has been applied to a scanning near-field optical microscope (SNOM), in order to improve sensitivity and resolution of a magneto-optical (MO) imaging. Polarized light modulated by a photoelastic modulator (PEM) was introduced into a bent-type optical fiber probe operated as an AFM cantilever, and transmitted MO signals were detected using a lock-in amplifier. Ar ion laser (488nm) was used as a light source. By using this technique, images of recorded marks on a Pt/Co disk were successfully obtained, which were written by a magnetic field modulation method with a length of 1μm and a track pitch of 1.6μm on a multilayer of Pt (0.8nm) / Co (0.3 nm) with thickness of 15nm. A resolution of approximately 90 nm was obtained in the MO imaging.

• 社団法人日本磁気学会の論文
• 1999-01-20

著者

• Sato K.

  Faculty of Engineering, Tohoku Gakuin University

• ISHIBASHI T.

  Faculty of Technology Tokyo University of Agriculture and Technology

• Yoshida T.

  Faculty of Agriculture Kochi University

• Mitsuoka Y.

  Technology Center Seiko Instruments Inc.

• Yamamoto J.

  Faculty of Technology, Tokyo University of Agriculture and Technology

• Nakajima K.

  Technology Center, Seiko Instruments Inc.

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