Abstract

A new configuration for optical thermally-assisted magnetic recording (TAMR) is proposed. It has been recognized that, in order to improve writability with TAMR, it is necessary to place the optical heating spot close to the magnetic pole, and with the new configuration, the distance from the optical heating spot to the magnetic pole is shortened. Employed is a Focusing Waveguide (FW), integrated into a flying slider, and a metal plasmon antenna attached to the bottom of the FW. With this configuration, optical near-field intensity peaks when the near-field spot is placed at the clad of the FW. As a result, the optical heating spot locates closer to the magnetic pole. Presented here are the results of simulating optical near-field generation, where the distance between the near-field spot and the magnetic pole is shortened from 450 nm to 120 nm. Using this configuration, the time lag between optical heating and magnetic writing is significantly shortened by a factor of one fourth.

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