{"id":280335,"date":"2023-04-19T12:42:27","date_gmt":"2023-04-19T12:42:27","guid":{"rendered":"\/forum\/forums\/topic\/0-order-of-diffraction-gratings\/"},"modified":"2023-04-19T12:42:27","modified_gmt":"2023-04-19T12:42:27","slug":"0-order-of-diffraction-gratings","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/0-order-of-diffraction-gratings\/","title":{"rendered":"0-order of diffraction gratings"},"content":{"rendered":"<p>Hi all,<br \/>I&#8217;m new to lumerical, and I&rsquo;m wondering how to get the zero-order reflection from a gratings. I&rsquo;ve built this model and solve it using FDTD.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/04\/19-04-2023-1681907973-Diffraction gratings.png\" alt=\"\" width=\"752\" height=\"164\"><br \/>however, I&rsquo;ve a feeling that the results are wrong and the reflection spectrum that I get is for the orders in this window.<\/p>\n<p>ps. when I reduce the monitor size (smaller than the FDTD window size) I get different reflection behaviour&nbsp;<\/p>\n<p>could you please advise about how to get the zero reflection for my range of wavelength?<\/p>\n<p>&nbsp;<\/p>\n<p>Best Regards<\/p>\n<p>Tahseen<\/p>\n","protected":false},"template":"","class_list":["post-280335","topic","type-topic","status-closed","hentry","topic-tag-diffraction-1","topic-tag-grating-1","topic-tag-lumerical"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["282455","2592"],"_bbp_author_ip":["23.220.96.180"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["607"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["280335"],"_bbp_forum_id":["27833"],"_bbp_engagement":["2592","282455"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["280418"],"_bbp_last_active_id":["280418"],"_bbp_last_active_time":["2023-04-19 18:39:01"]},"test":"tahseenjwadgmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/280335","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\/280335\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=280335"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}