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US 9,852,753 B2Granted
Waveguide light delivery with subwavelength mirror for heat-assisted magnetic recording
AssigneeSeagate Technology LLC
InventorChubing Peng
Life of this patent
Estimating the term…
Abstract
A recording head has a near-field transducer proximate a media facing surface of the read/write head. A waveguide overlaps and delivers light to the near-field transducer. A subwavelength focusing mirror is at an end of the waveguide proximate the media-facing surface. The subwavelength focusing mirror recycles a residual transverse field for excitation of the near-field transducer.
Claims20
A recording head comprising:
- a near-field transducer proximate a media facing surface of the read/write head;
- a waveguide that overlaps and delivers light to the near-field transducer;
- and
- a subwavelength focusing mirror at an end of the waveguide proximate the media-facing surface, the subwavelength focusing mirror recycling a residual transverse field for excitation of the near-field transducer.
1 more element
A recording head comprising:
- a near-field transducer proximate a media facing surface of the read/write head;
- a waveguide that overlaps and delivers light to the near-field transducer;
- and
- a subwavelength focusing mirror at an end of the waveguide proximate the media-facing surface, the subwavelength focusing mirror overlapping less than a length of the near-field transducer in a direction normal to the media-facing surface.
1 more element
A method comprising:
- directing light into a waveguide core of a recording head;
- coupling the light to a near-field transducer at an output end of the waveguide core near a media-facing surface of the recording head;
- and
- recycling a residual transverse electric field component for excitation of the near-field transducer via a subwavelength mirror at the output end of the waveguide, the sub-micron mirror overlapping less than a length of the near-field transducer in a direction normal to the media-facing surface.
1 more element
Dependencies are inferred from the claim text.