US Patent Application 17751773. VERTICAL GRATING COUPLER simplified abstract

VERTICAL GRATING COUPLER

Organization Name

TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.

Inventor(s)

Tai-Chun Huang of New Taipei (TW)

Stefan Rusu of Sunnyvale CA (US)

VERTICAL GRATING COUPLER - A simplified explanation of the abstract

This abstract first appeared for US patent application 17751773 titled 'VERTICAL GRATING COUPLER

Simplified Explanation

The patent application describes a vertical grating coupler.

• The grating coupler consists of a first waveguide, a second waveguide, and a dielectric layer between them.
• The first waveguide has a first grating with ridges and gaps, and the second waveguide has a second grating with ridges and gaps.
• The first grating, second grating, and dielectric layer are positioned in a vertical overlap region between the two waveguides.
• The first and second gratings have different grating periods.
• The gaps in both gratings are filled with the dielectric layer.

Original Abstract Submitted

A vertical grating coupler is disclosed. The grating coupler includes a first waveguide having a first grating, a second waveguide having a second grating, and a dielectric layer positioned between the first waveguide and the second waveguide. The first grating includes a plurality of first grating ridges separated by a plurality first grating gaps, and the second grating includes a plurality of second grating ridges separated by a plurality second grating gaps. The first grating, the second grating, and the dielectric layer are located in a vertical overlap region between the first waveguide and the second waveguide. The first grating and the second grating have different grating periods, and each of the plurality of first grating gaps and second grating gaps are filled with the dielectric layer.