公开(公告)号：US20200027478A1

公开(公告)日：2020-01-23

申请号：US16446882

申请日：2019-06-20

Applicant: Seagate Technology LLC

Inventor： Christopher Neil Harvey ,  Kelly Elizabeth Callan ,  Aidan Dominic Goggin ,  John Bernard McGurk ,  Reyad Mehfuz ,  Christopher Gerwyn Ward

IPC: G11B5/48

Abstract: A recording head has a waveguide core with an input end proximate an energy source at an input surface of the recording head. The waveguide core couples light from the energy source to a near-field transducer that heats a recording medium in response to the light. An input coupler extends along the waveguide core from the input end to a termination region that is away from the input end in a light propagation direction. The input coupler has a first refractive index between that of the waveguide core and a surrounding material. The input coupler is wider than the waveguide core and has a slanted edge at the termination region. The slanted edge crosses the waveguide core such that the input coupler narrows to a neck away from the waveguide core in a crosstrack direction.