Near field transducer driven by a transverse electric waveguide for energy assisted magnetic recording
US8976635B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2014 |
| Grant date | Mar 10, 2015 |
| Priority date | — |
| Expiry date | Jul 7, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus includes dielectric waveguide cores operating in transverse electric (TE) mode configured to receive incident light energy from an energy source and direct the incident light energy to a target. A near field transducer (NFT) is configured to focus the light energy received from the waveguide cores and to transmit the focused light energy onto a storage disk surface to generate a heating spot. The NFT includes propagating surface plasmon polariton (PSPP) elements that are energized by the light energy from the waveguide cores. Each PSPP element has a plasmonic metal bar disposed above a surface of a single waveguide core in a longitudinal alignment with the waveguide core, a first end that receives the light energy from the waveguide core, and a second end exposed to the air bearing surface. The width of each metal bar tapers toward the first end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.