Thermally assisted recording of magnetic media using an optical resonant cavity and nano-pin power delivery device
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United States of America Patent
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May 25, 2010
Grant Date -
Jun 26, 2008
app pub date -
Dec 22, 2006
filing date -
Dec 22, 2006
priority date (Note) -
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Abstract
The media heating device of the magnetic head includes an optical resonant cavity and a nano-pin that produces a high intensity near-field optical beam of sub-wavelength dimension adjacent to the write pole. The cavity is fabricated as a planar thin film structure in layers that are generally parallel to the magnetic pole thin film layers of the magnetic head, such that a principal axis of the resonant cavity is parallel to the air bearing surface (ABS). Optical energy is coupled into the resonant cavity through a waveguide that is placed proximate the cavity, and optical energy is coupled out of the cavity through a nano-pin that is disposed between the resonant cavity and the ABS.
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