{"id":217816,"date":"2022-07-06T09:15:27","date_gmt":"2022-07-06T09:15:27","guid":{"rendered":"\/forum\/forums\/topic\/how-to-identify-the-fundamental-te-mode-and-tm-mode-in-the-multilayer-structure\/"},"modified":"2022-07-06T09:15:27","modified_gmt":"2022-07-06T09:15:27","slug":"how-to-identify-the-fundamental-te-mode-and-tm-mode-in-the-multilayer-structure","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-identify-the-fundamental-te-mode-and-tm-mode-in-the-multilayer-structure\/","title":{"rendered":"How to identify the fundamental TE mode and TM mode in the multilayer structure"},"content":{"rendered":"<p>I am trying to simulate an edge coupler structure with FDE. The cross section of the edge coupler includes two nitride layers in oxide as shown in the following picture. Now I want to get the fundamental TE\/TM mode of the facet of the structure. Considering the high index Si substrate, &#8220;modal analysis&#8221; in FDE solver cannot use max index. And I am confused what should I set the search index?<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/07\/06-07-2022-1657098063-structure.JPG\" alt=\"\"><\/p>\n<p>If I ignore the Si substrate and use the max index. Then how to identify the TE\/TM mode? Thank you very much.<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/07\/06-07-2022-1657098861-simulate result.JPG\" alt=\"\"><\/p>\n","protected":false},"template":"","class_list":["post-217816","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["189859","2592"],"_bbp_author_ip":["23.218.93.53"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["2031"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["217816"],"_bbp_forum_id":["27833"],"_bbp_engagement":["2592","189859"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["217919"],"_bbp_last_active_id":["217919"],"_bbp_last_active_time":["2022-07-06 21:04:41"]},"test":"liyaqian"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/217816","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\/217816\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=217816"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}