Abstract
A magneto-optical hybrid recording is one of the effective approaches to achieve high density in magnetic recording. In hybrid recording, the most important issue, specifically, is the magnetic head device with the near-field optics for heat assisted recording. In this study, we proposed a Near-field Optical Advanced Hybrid (NOAH) head for high efficiency of optics in hybrid recording. The head slider was designed using a transparent material for achieving a high efficiency of optical light. The shape and material of the plasmon antenna was studied by using the Finite Difference Time Domain (FDTD) method. According to these results, an antenna was designed and fabricated on the polished transparent slider. An experimental system was built for the head with a red diode laser and a lens at Numerical Aperture (NA) = 0.8. In a recording experiment, a mark of about 130 nm in diameter was observed on the dyed film by using the fabricated NOAH head.
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