{"id":362327,"date":"2024-04-15T19:48:58","date_gmt":"2024-04-15T19:48:58","guid":{"rendered":"\/forum\/forums\/topic\/effective-indices-of-first-two-modes-in-swg-2\/"},"modified":"2024-04-15T19:48:58","modified_gmt":"2024-04-15T19:48:58","slug":"effective-indices-of-first-two-modes-in-swg-2","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/effective-indices-of-first-two-modes-in-swg-2\/","title":{"rendered":"Effective indices of first two modes in SWG"},"content":{"rendered":"<p>Hi ,<\/p>\n<p>I am trying to do Band structure analysis using &nbsp;https:\/\/www.lumerical.com\/learn\/video\/swg-bandstructures\/ this example. When i try to calculate the effective index of first order TE mode (neff1) it is giving me a wiered result. My fundamental TE mode value looks okay.<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/15-04-2024-1713210184-mceclip0.png\"><\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/15-04-2024-1713210257-mceclip1.png\"><\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/15-04-2024-1713210302-mceclip2.png\"><\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/15-04-2024-1713210324-mceclip3.png\"><\/p>\n<p>my grating period is 222 nm and duty cycle is 50%. My waveguide is 1.7 um wide .<\/p>\n<p>https:\/\/drive.google.com\/file\/d\/1kSy_NjMnSB0UCjFtdO8S1lptvl1Jsl08\/view?usp=sharing<\/p>\n<p>Please see my file attached.&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-362327","topic","type-topic","status-closed","hentry","topic-tag-3DFDTD-1","topic-tag-effectiveindex-1","topic-tag-lumerical","topic-tag-LumericalFDTD-1","topic-tag-simulation"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_oembed_be80fa4a5e3fc646d5f6998bcc9974b0":["{{unknown}}"],"_bbp_subscription":["3441","2592"],"_bbp_author_ip":["23.206.193.146"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["449"],"_bbp_topic_status":["unanswered"],"_oembed_cb5c941c3c66b5513aa2c264d8b823f7":["{{unknown}}"],"_bbp_topic_id":["362327"],"_bbp_forum_id":["27833"],"_bbp_engagement":["2592","3441"],"_bbp_voice_count":["2"],"_bbp_reply_count":["8"],"_bbp_last_reply_id":["363239"],"_bbp_last_active_id":["363239"],"_bbp_last_active_time":["2024-04-19 15:50:57"]},"test":"minusunnycmail-carleton-ca"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/362327","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\/362327\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=362327"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}