Planar plasmon generator with a scalable feature for TAMR
US8599656B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2011 |
| Grant date | Dec 3, 2013 |
| Priority date | — |
| Expiry date | Dec 12, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A TAMR (Thermal Assisted Magnetic Recording) write head uses the energy of optical-laser excited surface plasmons in a scalable planar plasmon generator to locally heat a magnetic recording medium and reduce its coercivity and magnetic anisotropy. The planar plasmon generator is formed as a multi-layered structure in which one planar layer supports a propagating surface plasmon mode that is excited by evanescent coupling to an optical mode in an adjacent waveguide. A peg, which can be a free-standing element or an integral projection from one of the layers, is positioned between the ABS end of the generator and the surface of the recording medium, confines and concentrates the near field of the plasmon mode immediately around and beneath it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.