<p>Hello, performing aperiodic simulations with plane wave sources can be challenging since the plane wave itself has infinite extent. In FDTD you can use a finite sized plane wave source by changing the “plane wave type” property of the plane wave source to “Diffracting” but it will diffract at the edges of the source.<br><br>You can avoid this using a TFSF source, but this is an advanced source and you should make sure you understand how it works. These pages have more information on the TFSF source:<\/p><\/p>\n
<p>Another option is adding an aperture to block the diffracting edges of the plane wave similar to the full lens simulation in the Small-Scale Metalens – Field Propagation<\/a> example.<\/p><\/p>\n","protected":false},"template":"","class_list":["post-368146","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t