# Distance between PML layer and power monitor

#1

Hi, I was wondering will there be a problem if a place a frequency domain field and power monitor close to the PML boundary? e.g., I am placing line monitor at y=2.60 microns, whereas my PML starts from y = 2.65 microns, with the wavelength of simulation at 1.55 microns. Will that create any problem?

#2

Hi @zo42,

There should be no problem as long as the monitor is inside the simulation region.