VERTICAL GRATING COUPLER
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United States of America
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Issued Date -
Mar 20, 2025
app pub date -
Dec 5, 2024
filing date -
Dec 5, 2024
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Abstract
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.
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