{"id":355451,"date":"2024-03-05T18:00:20","date_gmt":"2024-03-05T18:00:20","guid":{"rendered":"\/forum\/forums\/topic\/simulating-transmission-within-a-phc-waveguide-lumerical-fdtd\/"},"modified":"2024-03-20T15:49:49","modified_gmt":"2024-03-20T15:49:49","slug":"simulating-transmission-within-a-phc-waveguide-lumerical-fdtd","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulating-transmission-within-a-phc-waveguide-lumerical-fdtd\/","title":{"rendered":"simulating transmission within a phC waveguide – Lumerical FDTD Duplicated"},"content":{"rendered":"

Hi!<\/p>\n

 I am trying to simulate the transmission spectra through a photonic crystal line defect waveguide of a specific geometry. My geometry looks like this:
<\/a><\/p>\n

With the PML extending through the output waveguide, as suggested within this thread <\/p>\n

\/forum\/forums\/topic\/simulating-photonic-crystal-waveguide-boundary-conditions-and-satbility\/<\/a><\/p>\n

Because I am using a mode source over a wide frequency range, I am using multiple frequency dependent profiles to increase the accuracy over this range. I am injecting the mode profile of the input waveguide.
<\/a><\/p>\n

To create my transmission spectra I have two DFT Monitors – one measuring the reflected power (behind the source) and one measuring transmission to the output waveguide. (See below for layout of monitors). <\/p>\n

<\/a><\/p>\n

After simulating I get the result plots below but I am unsure about the results. I’m not entirely sure where power is being lost (I have been using a movie monitor to try and debug this, to no result) and additionally, these results have been very sensitive to small changes in input parameters.<\/p>\n

<\/a><\/p>\n

Any advice on how to carry out this type of simulation would be appreciated!! Thank you!!<\/p>\n

 <\/p>\n","protected":false},"template":"","class_list":["post-355451","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["340636","2592"],"_bbp_author_ip":["23.218.248.146"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["61"],"_bbp_topic_status":["unanswered"],"_edit_lock":["1709668585:70791"],"_bbp_topic_id":["355451"],"_bbp_forum_id":["27833"],"_bbp_engagement":["2592","340636"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["355478"],"_bbp_last_active_id":["355478"],"_bbp_last_active_time":["2024-03-05 19:57:50"]},"test":"im1n21soton-ac-uk"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/355451","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":1,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/355451\/revisions"}],"predecessor-version":[{"id":355477,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/355451\/revisions\/355477"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=355451"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}