Layered optical waveguide and near field transducer
US8509037B1 · kind B1 · utility
13Cited by
2References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2012 |
| Grant date | Aug 13, 2013 |
| Priority date | — |
| Expiry date | Apr 24, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A waveguide extends away from a media-facing surface. The waveguide includes top and bottom cladding layers and a core disposed therebetween. The core includes a middle core layer and an outside core layer having respective first and second indices of refraction. The first index of refraction is smaller than the second index of refraction. A near field transducer is disposed within the middle core layer proximate the media-facing surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.