Multi-ridged subwavelength aperture for optical transmission and thermally assisted magnetic recording
US7649677B2 · kind B2 · utility
22Cited by
11References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2006 |
| Grant date | Jan 19, 2010 |
| Priority date | — |
| Expiry date | Feb 5, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A subwavelength aperture includes a plurality of ridges that project from an aperture sidewall into the aperture opening. The ridges may be closely spaced such that the hot spots associated with the ridges are likewise closely spaced and create an elongated hot spot. The subwavelength aperture of the present invention may be adapted for use in a magnetic head of a hard disk drive for improved thermally assisted recording (TAR) of magnetic data bits. Such a magnetic head may include an optical resonant cavity that is fabricated within the magnetic head structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.