Layered optical waveguide and near field transducer

摘要

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.