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Near-field transducer with a dielectric slit at internal surfaces for controlling feedback to a light source
Near-field transducer with a dielectric slit at internal surfaces for controlling feedback to a light source
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机译:近场换能器,其内表面具有电介质狭缝,用于控制对光源的反馈
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摘要
A recording head includes a waveguide configured to deliver light from a light source to a media-facing surface of the recording head. A near-field transducer is at the media-facing surface the proximate the waveguide. The near-field transducer includes a plasmonic structure with at least two opposing internal surfaces. A dielectric material fills a region between the at least two opposing internal surfaces. A dielectric slit extends between the at least two opposing internal surfaces. The dielectric slit is substantially parallel to the media-facing surface and includes a transparent material with a refractive index different than that of the dielectric material.
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