Patent ID: 11960116
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 9:
10. A structure, comprising: a first waveguide, comprising a first strip portion and a first tapered tip portion connected to the first strip portion, wherein the first tapered tip portion has a first end connected to the first strip portion and a second end opposite to the first end of the first tapered tip portion, and a width of the first end of the first tapered tip portion is greater than a width of the second end of the first tapered tip portion; and a second waveguide, comprising a second strip portion and a second tapered tip portion connected to the second strip portion, wherein the second tapered tip portion has a first end connected to the second strip portion and a second end opposite to the first end of the second tapered tip portion, and a width of the first end of the second tapered tip portion is greater than a width of the second end of the second tapered tip portion, and the first tapered tip portion is adjacent to the second tapered tip portion, and wherein a refractive index of the first waveguide is greater than a refractive index of the second waveguide, and the width of the second end of the first tapered tip portion is smaller than the width of the second end of the second tapered tip portion; and
a center axis of the first strip portion of the first waveguide is offset from a center axis of the second strip portion of the second waveguide; wherein the first tapered tip portion has a first sidewall and a second sidewall opposite to the first sidewall, the first sidewall of the first tapered tip portion is parallel to the center axis of the first strip portion, and the second sidewall of the first tapered tip portion is inclined with respect to the center axis of the first strip portion.