Convergence test is only more suitable for sub-wavelength grating device, not suitable for general other device like mmi ? #241
Description
Hello,
I am sorry, but I have a question "Convergence test is only more suitable for sub-wavelength grating device, not suitable for general other device like mmi ?
I find it can not update FDTD z span even I make Initial_FDTD_Z_span is small, about 3 um.