{"id":167471,"date":"2022-03-18T15:56:10","date_gmt":"2022-03-18T15:56:10","guid":{"rendered":"\/forum\/forums\/topic\/how-is-free-space-treated-in-fdtd-where-to-put-monitors\/"},"modified":"2022-04-26T22:34:48","modified_gmt":"2022-04-26T22:34:48","slug":"how-is-free-space-treated-in-fdtd-where-to-put-monitors","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-is-free-space-treated-in-fdtd-where-to-put-monitors\/","title":{"rendered":"How is free space treated in FDTD? Where to put monitors?"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hello,<\/p>\n<p>My goal is to determine the reflection, transmission and absorption through a material. I have observed that when I have a FDTD simulation with a plane wave source illuminating a flat substrate from above and nothing else, the location of where I place my monitors matters greatly for my result. The monitor 10nm below the plane wave source has a higher amplitude vs the monitor 100nm below the plane wave source (both are above the substrate). Why is this? Shouldn&#039;t the amount of transmission through two monitors not change between monitor locations if there is nothing but free space in between them?<\/p>\n<p>Thanks!<\/p>\n","protected":false},"template":"","class_list":["post-167471","topic","type-topic","status-closed","hentry","topic-tag-fdtd","topic-tag-monitors","topic-tag-physics"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_btv_view_count":["966"],"_bbp_likes_count":["0"],"_bbp_subscription":["251293"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["167471"],"_bbp_forum_id":["27833"],"_bbp_engagement":["862","2592","251293"],"_bbp_voice_count":["3"],"_bbp_reply_count":["8"],"_bbp_last_reply_id":["208861"],"_bbp_last_active_id":["208861"],"_bbp_last_active_time":["2022-04-26 22:34:48"]},"test":"serenek4gmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/167471","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\/167471\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=167471"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}