Patent ID: 11927806
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 3:
4. A system for communication, comprising:
a semiconductor substrate;
a first metal layer formed on the semiconductor substrate;
a first dielectric layer formed on the first metal layer;
a silicon layer formed on the first dielectric layer;
a plurality of coupling gratings formed by patterning the silicon layer, wherein the plurality of coupling gratings each comprises at least one step in a first lateral direction and extends in a second lateral direction, wherein the first and second lateral directions are parallel to a surface of the substrate and perpendicular to each other in a grating plane, wherein each of the plurality of coupling gratings comprises a first trench, a pillar and a second trench disposed between the first trench and the pillar, wherein a first pillar of a first coupling grating of the plurality of coupling gratings has a first width and a second pillar of a second coupling grating of the plurality of coupling gratings has a second width different than the first width;
a waveguide, the waveguide comprises a first optical medium with a first thickness;
a cladding layer, wherein the cladding layer comprises a second optical medium and a first continuous planar surface;
a first reflection layer, wherein the first reflection layer is configured such that the plurality of coupling gratings is disposed between the first reflection layer and the cladding layer; and
a second reflection layer, wherein the second reflection layer is configured such that the cladding layer is disposed between the second reflection layer and the waveguide.