Interfering near field transducer having a wide metal bar feature for energy assisted magnetic recording
US9007879B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2014 |
| Grant date | Apr 14, 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 for energy assisted magnetic recording of a storage disk include a plurality of dielectric waveguide cores configured to direct received incident light energy to a target, and a near field transducer (NFT) configured to focus light energy received from the plurality of waveguide cores and to transmit the focused light energy onto the storage disk surface to generate a heating spot on the storage disk. The NFT includes a plurality of propagating surface plasmon polariton (PSPP) elements that are energized by the light energy from the waveguide cores. Each of the PSPP elements has a plasmonic metal bar disposed above a single waveguide core in a longitudinal alignment. Each metal bar has a width at least twice the width of the heating spot generated on the storage disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.