Reply To: Can someone guide me regarding focusing spots in case of metalens being modeled

[Guilin Sun]

I believe it is not due to comatic aberration. It might be due to the polarization. Please check if the two sports are due to the two linearly polarized light sources: use linear polarization (eg, Ex and Ey) as the source and check the images. are they angled incidence? does the metalens has 90deg rotation symmetry ?

you may also check if the simulation is wide enough to reduce the diffraction effect caused by PML truncation to the incident plane wave. 

please provide some screenshots about the device and settings.