{"id":392968,"date":"2024-11-06T12:27:10","date_gmt":"2024-11-06T12:27:10","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/illumination-with-an-incident-angle-greater-than-0-fdtd\/"},"modified":"2024-11-06T12:27:10","modified_gmt":"2024-11-06T12:27:10","slug":"illumination-with-an-incident-angle-greater-than-0-fdtd","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/illumination-with-an-incident-angle-greater-than-0-fdtd\/","title":{"rendered":"Illumination with an incident angle greater than 0\u00b0 FDTD"},"content":{"rendered":"<p>&lt;p&gt;Dear all,&lt;\/p&gt;&lt;p&gt;I hope you are doing well. I have some issues regarding the illumination of a metasurface with an incident angle greater than 0&deg; with FDTD.&lt;\/p&gt;&lt;p&gt;To be more specific, the metasurface under test is a 2D grating that I previously simulated with Lumerical RCWA, with an incident angle of 45&deg; and P polarization.&lt;\/p&gt;&lt;p&gt;Of course with RCWA i got the R\/T spectra that I expected however I cannot figure out how to set the same simulation with FDTD.&lt;\/p&gt;&lt;p&gt;In particular my main doubts are:&lt;\/p&gt;&lt;p&gt;1) Which kind of boundary conditions should I use to ensure still the periodicity (along the x direction) but taking into account the illumnation angle ad the P polarization?&lt;\/p&gt;&lt;p&gt;2) What kind of plane wave source should I set?&lt;\/p&gt;&lt;p&gt;Thank you in advance.&lt;\/p&gt;&lt;p&gt;Best Regards&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;Giovanni&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-392968","topic","type-topic","status-publish","hentry","topic-tag-LumericalFDTD-1","topic-tag-metasurface-1","topic-tag-periodic-bc-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["349934","473055","447143"],"_bbp_author_ip":["193.204.49.157"],"_btv_view_count":["293"],"_bbp_topic_status":["unanswered"],"_bbp_likes_count":["1"],"_bbp_notification_enabled":["473055"],"_bbp_topic_id":["392968"],"_bbp_forum_id":["27833"],"_bbp_engagement":["349934","447143","473055"],"_bbp_voice_count":["3"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["393251"],"_bbp_last_active_id":["393251"],"_bbp_last_active_time":["2024-11-07 20:04:58"]},"test":"giovanni-piscopomycit-ie"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/392968","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/392968\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=392968"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}