Thermally assisted magnetic recording head with optical spot-size converter attached two dimensional thin waveguide

摘要

One embodiment generally relates to a magnetic recording head. The magnetic recording head has a body having an upper surface and a media bearing surface, a spot size converter disposed in the body and extending from the upper surface to the media bearing surface. The spot size converter has a core, comprising a first portion having a rectangular wall extending below the upper surface; and a second portion having a trapezoidal wall extending below the first portion. The magnetic recording head additionally has a first cladding adjacent to the spot size converter in an in-surface direction of the spot size converter, wherein the first cladding has a first refractive index lower than a refractive index of the spot size converter.

主权项

1. A magnetic recording head, comprising: a body having an upper surface and a media facing surface; a spot size converter disposed in the body, the spot size converter comprising: a core, comprising: a first portion having a rectangular wall extending below the upper surface; and a second portion having a trapezoidal wall extending below the first portion; a first cladding adjacent to the spot size converter and in an in-surface direction of the spot size converter, wherein the first cladding has a first refractive index lower than a refractive index of the spot size converter, wherein the first cladding has a same thickness as the core; and a second cladding adjacent to and in contact with the spot size converter in a film thickness direction of the spot size converter, wherein the second cladding has a second refractive index lower than the refractive index of the spot size converter, and wherein the spot size converter and the first cladding are sandwiched between the second cladding, and the second cladding is divided into two portions by the first cladding and the spot size converter, wherein the first cladding is different from the second cladding and each of the two portions is completely separate from the other of the two portions throughout the entire width of the magnetic recording head in a direction parallel to the in-surface direction of the spot size converter.