{"id":310299,"date":"2023-10-06T00:39:34","date_gmt":"2023-10-06T00:39:34","guid":{"rendered":"\/forum\/forums\/topic\/difference-in-accuracy-between-rcwa-and-fdtd\/"},"modified":"2023-10-06T00:39:34","modified_gmt":"2023-10-06T00:39:34","slug":"difference-in-accuracy-between-rcwa-and-fdtd","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/difference-in-accuracy-between-rcwa-and-fdtd\/","title":{"rendered":"Difference in accuracy between RCWA and FDTD"},"content":{"rendered":"<p>The RCWA and FDTD show different reflectance results in the same regular pyramid structure.<\/p>\n<p>I know the RCWA has a relatively lower accuracy than FDTD, so I tried to improve the accuracy of RCWA results.<\/p>\n<p>&nbsp;<\/p>\n<p>I have changed the number of relative interfaces k vectors, the number of relative interfaces, and the k domain.<\/p>\n<p>RCWA results show something changed as k vector increases and the number of relative interfaces, but the results are still different from the FDTD result.<\/p>\n<p>(k domain didn&#8217;t affect the accuracy of results.)<\/p>\n<p>&nbsp;<\/p>\n<p>I don&#8217;t know the reason why the RCWA shows a big difference from FDTD.<\/p>\n<p>The value of k has been increased to the level that the computer&#8217;s memory can run programs.<\/p>\n<p>Is there a way to improve the accuracy of RCWA to a level similar to that of FDTD?<\/p>\n<p>&nbsp;<\/p>\n<p>The simulation results and my program files are attached below.<\/p>\n<p>If you can, please check my setting of FDTD and RCWA in fsp files.<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/10\/06-10-2023-1696552656-mceclip0.png\"><\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/10\/06-10-2023-1696552666-mceclip1.png\"><\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/10\/06-10-2023-1696552677-mceclip2.png\"><\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/10\/06-10-2023-1696552686-mceclip3.png\"><\/p>\n<p>&nbsp;<\/p>\n<p><a title=\"RCWA fsp\" href=\"https:\/\/drive.google.com\/file\/d\/18zMcwKmJRkb7Cq-v0TNkE-jDUx5WI2dm\/view?usp=drive_link\">https:\/\/drive.google.com\/file\/d\/18zMcwKmJRkb7Cq-v0TNkE-jDUx5WI2dm\/view?usp=drive_link<\/a><\/p>\n<p><a title=\"FDTD fsp\" href=\"https:\/\/drive.google.com\/file\/d\/17Z0xKsg4beiLttKTG4WpC0HpMSM9u95Q\/view?usp=drive_link\">https:\/\/drive.google.com\/file\/d\/17Z0xKsg4beiLttKTG4WpC0HpMSM9u95Q\/view?usp=drive_link<\/a><\/p>\n","protected":false},"template":"","class_list":["post-310299","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["27993","33648"],"_bbp_author_ip":["23.52.43.88"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["1006"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["310299"],"_bbp_forum_id":["27833"],"_bbp_engagement":["27993","33648"],"_bbp_voice_count":["2"],"_bbp_reply_count":["9"],"_bbp_last_reply_id":["313708"],"_bbp_last_active_id":["313708"],"_bbp_last_active_time":["2023-10-27 16:53:23"]},"test":"handonseas-harvard-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/310299","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\/310299\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=310299"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}