Create circular grating coupler based on Zhu et al., (2017) https://doi.org/10.1364/OE.25.033297 for SiN. Still misses the cladding layer.
Create circular grating coupler based on Zhu et al., (2017) https://doi.org/10.1364/OE.25.033297 for SiN.
Still misses the cladding layer.

DerekK88/PICwriter