{"id":355452,"date":"2024-03-05T18:00:27","date_gmt":"2024-03-05T18:00:27","guid":{"rendered":"\/forum\/forums\/topic\/simulating-transmission-within-a-phc-waveguide-lumerical-fdtd-2\/"},"modified":"2024-03-05T18:00:27","modified_gmt":"2024-03-05T18:00:27","slug":"simulating-transmission-within-a-phc-waveguide-lumerical-fdtd-2","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulating-transmission-within-a-phc-waveguide-lumerical-fdtd-2\/","title":{"rendered":"simulating transmission within a phC waveguide &#8211; Lumerical FDTD"},"content":{"rendered":"<p>Hi!<\/p>\n<p>&nbsp;I am trying to simulate the transmission spectra through a photonic crystal line defect waveguide of a specific geometry. My geometry looks like this:<br \/><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/05-03-2024-1709660775-mceclip0.png\"><\/p>\n<p>With the PML extending through the output waveguide, as suggested within this thread&nbsp;<\/p>\n<p class=\"MsoNormal\"><a href=\"https:\/\/eur03.safelinks.protection.outlook.com\/?url=https%3A%2F%2Fforum.ansys.com%2Fforums%2Ftopic%2Fsimulating-photonic-crystal-waveguide-boundary-conditions-and-satbility%2F&amp;data=05%7C02%7Cim1n21%40soton.ac.uk%7C25bd742a591a4bde007408dc3c8f7a20%7C4a5378f929f44d3ebe89669d03ada9d8%7C0%7C0%7C638451834121799333%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&amp;sdata=4KSLfm%2Fz0gi2k6Mnu5AxZ2tucDPJqeor7Jmuf61V65U%3D&amp;reserved=0\">\/forum\/forums\/topic\/simulating-photonic-crystal-waveguide-boundary-conditions-and-satbility\/<\/a><\/p>\n<p class=\"MsoNormal\">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.<br \/><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/05-03-2024-1709660870-mceclip1.png\"><\/p>\n<p class=\"MsoNormal\">To create my transmission spectra I have two DFT Monitors &#8211; one measuring the reflected power (behind the source) and one measuring transmission to the output waveguide. (See below for layout of monitors).&nbsp;<\/p>\n<p class=\"MsoNormal\"><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/05-03-2024-1709661582-mceclip2.png\"><\/p>\n<p class=\"MsoNormal\">After simulating I get the result plots below but I am unsure about the results. I&#8217;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<p class=\"MsoNormal\"><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/05-03-2024-1709661617-mceclip3.png\"><\/p>\n<p class=\"MsoNormal\">Any advice on how to carry out this type of simulation would be appreciated!! Thank you!!<\/p>\n<p class=\"MsoNormal\">&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-355452","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hi! I am trying to simulate the transmission spectra through a photonic crystal line defect waveguide of a specific geometry. My geometry looks like this:With the PML extending through the output waveguide, as suggested within this thread \/forum\/forums\/topic\/simulating-photonic-crystal-waveguide-boundary-conditions-and-satbility\/Because I am using a mode source over a wide frequency range, I am using multiple frequency dependent profiles to\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulating-transmission-within-a-phc-waveguide-lumerical-fdtd-2\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"simulating transmission within a phC waveguide \u2013 Lumerical FDTD | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hi! I am trying to simulate the transmission spectra through a photonic crystal line defect waveguide of a specific geometry. My geometry looks like this:With the PML extending through the output waveguide, as suggested within this thread \/forum\/forums\/topic\/simulating-photonic-crystal-waveguide-boundary-conditions-and-satbility\/Because I am using a mode source over a wide frequency range, I am using multiple frequency dependent profiles to\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulating-transmission-within-a-phc-waveguide-lumerical-fdtd-2\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/05-03-2024-1709660775-mceclip0.png\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/05-03-2024-1709660775-mceclip0.png\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2024-03-05T18:00:27+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2024-03-05T18:00:27+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"simulating transmission within a phC waveguide \u2013 Lumerical FDTD | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Hi! I am trying to simulate the transmission spectra through a photonic crystal line defect waveguide of a specific geometry. My geometry looks like this:With the PML extending through the output waveguide, as suggested within this thread \/forum\/forums\/topic\/simulating-photonic-crystal-waveguide-boundary-conditions-and-satbility\/Because I am using a mode source over a wide frequency range, I am using multiple frequency dependent profiles to\" \/>\n\t\t<meta name=\"twitter:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/05-03-2024-1709660775-mceclip0.png\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/simulating-transmission-within-a-phc-waveguide-lumerical-fdtd-2\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"position\":2,\"name\":\"Topics\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/simulating-transmission-within-a-phc-waveguide-lumerical-fdtd-2\\\/#listItem\",\"name\":\"simulating transmission within a phC waveguide &#8211; Lumerical FDTD\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/simulating-transmission-within-a-phc-waveguide-lumerical-fdtd-2\\\/#listItem\",\"position\":3,\"name\":\"simulating transmission within a phC waveguide &#8211; Lumerical FDTD\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/simulating-transmission-within-a-phc-waveguide-lumerical-fdtd-2\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/simulating-transmission-within-a-phc-waveguide-lumerical-fdtd-2\\\/\",\"name\":\"simulating transmission within a phC waveguide \\u2013 Lumerical FDTD | Ansys Learning Forum\",\"description\":\"Hi! I am trying to simulate the transmission spectra through a photonic crystal line defect waveguide of a specific geometry. My geometry looks like this:With the PML extending through the output waveguide, as suggested within this thread \\\/forum\\\/forums\\\/topic\\\/simulating-photonic-crystal-waveguide-boundary-conditions-and-satbility\\\/Because I am using a mode source over a wide frequency range, I am using multiple frequency dependent profiles to\",\"inLanguage\":\"en-US\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/simulating-transmission-within-a-phc-waveguide-lumerical-fdtd-2\\\/#breadcrumblist\"},\"datePublished\":\"2024-03-05T18:00:27+00:00\",\"dateModified\":\"2024-03-05T18:00:27+00:00\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"inLanguage\":\"en-US\",\"publisher\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\"}}]}\n\t\t<\/script>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"simulating transmission within a phC waveguide \u2013 Lumerical FDTD | Ansys Learning Forum","description":"Hi! I am trying to simulate the transmission spectra through a photonic crystal line defect waveguide of a specific geometry. My geometry looks like this:With the PML extending through the output waveguide, as suggested within this thread \/forum\/forums\/topic\/simulating-photonic-crystal-waveguide-boundary-conditions-and-satbility\/Because I am using a mode source over a wide frequency range, I am using multiple frequency dependent profiles to","canonical_url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulating-transmission-within-a-phc-waveguide-lumerical-fdtd-2\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BreadcrumbList","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulating-transmission-within-a-phc-waveguide-lumerical-fdtd-2\/#breadcrumblist","itemListElement":[{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum#listItem","position":1,"name":"Home","item":"https:\/\/innovationspace.ansys.com\/forum","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/topics\/#listItem","name":"Topics"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/topics\/#listItem","position":2,"name":"Topics","item":"https:\/\/innovationspace.ansys.com\/forum\/topics\/","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulating-transmission-within-a-phc-waveguide-lumerical-fdtd-2\/#listItem","name":"simulating transmission within a phC waveguide &#8211; Lumerical FDTD"},"previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum#listItem","name":"Home"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulating-transmission-within-a-phc-waveguide-lumerical-fdtd-2\/#listItem","position":3,"name":"simulating transmission within a phC waveguide &#8211; Lumerical FDTD","previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/topics\/#listItem","name":"Topics"}}]},{"@type":"Organization","@id":"https:\/\/innovationspace.ansys.com\/forum\/#organization","name":"Ansys Learning Forum","description":"Ansys Innovation Space","url":"https:\/\/innovationspace.ansys.com\/forum\/"},{"@type":"WebPage","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulating-transmission-within-a-phc-waveguide-lumerical-fdtd-2\/#webpage","url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulating-transmission-within-a-phc-waveguide-lumerical-fdtd-2\/","name":"simulating transmission within a phC waveguide \u2013 Lumerical FDTD | Ansys Learning Forum","description":"Hi! I am trying to simulate the transmission spectra through a photonic crystal line defect waveguide of a specific geometry. My geometry looks like this:With the PML extending through the output waveguide, as suggested within this thread \/forum\/forums\/topic\/simulating-photonic-crystal-waveguide-boundary-conditions-and-satbility\/Because I am using a mode source over a wide frequency range, I am using multiple frequency dependent profiles to","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#website"},"breadcrumb":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulating-transmission-within-a-phc-waveguide-lumerical-fdtd-2\/#breadcrumblist"},"datePublished":"2024-03-05T18:00:27+00:00","dateModified":"2024-03-05T18:00:27+00:00"},{"@type":"WebSite","@id":"https:\/\/innovationspace.ansys.com\/forum\/#website","url":"https:\/\/innovationspace.ansys.com\/forum\/","name":"Ansys Learning Forum","description":"Ansys Innovation Space","inLanguage":"en-US","publisher":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#organization"}}]},"og:locale":"en_US","og:site_name":"Ansys Learning Forum | Ansys Innovation Space","og:type":"article","og:title":"simulating transmission within a phC waveguide \u2013 Lumerical FDTD | Ansys Learning Forum","og:description":"Hi! I am trying to simulate the transmission spectra through a photonic crystal line defect waveguide of a specific geometry. My geometry looks like this:With the PML extending through the output waveguide, as suggested within this thread \/forum\/forums\/topic\/simulating-photonic-crystal-waveguide-boundary-conditions-and-satbility\/Because I am using a mode source over a wide frequency range, I am using multiple frequency dependent profiles to","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulating-transmission-within-a-phc-waveguide-lumerical-fdtd-2\/","og:image":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/05-03-2024-1709660775-mceclip0.png","og:image:secure_url":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/05-03-2024-1709660775-mceclip0.png","article:published_time":"2024-03-05T18:00:27+00:00","article:modified_time":"2024-03-05T18:00:27+00:00","twitter:card":"summary_large_image","twitter:title":"simulating transmission within a phC waveguide \u2013 Lumerical FDTD | Ansys Learning Forum","twitter:description":"Hi! I am trying to simulate the transmission spectra through a photonic crystal line defect waveguide of a specific geometry. My geometry looks like this:With the PML extending through the output waveguide, as suggested within this thread \/forum\/forums\/topic\/simulating-photonic-crystal-waveguide-boundary-conditions-and-satbility\/Because I am using a mode source over a wide frequency range, I am using multiple frequency dependent profiles to","twitter:image":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/05-03-2024-1709660775-mceclip0.png"},"aioseo_meta_data":{"post_id":"355452","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"content","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":true,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"limit_modified_date":false,"created":"2024-10-28 16:55:56","updated":"2024-10-28 16:55:56","ai":null,"breadcrumb_settings":null,"seo_analyzer_scan_date":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\/topics\/\" title=\"Topics\">Topics<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tsimulating transmission within a phC waveguide \u2013 Lumerical FDTD\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/innovationspace.ansys.com\/forum"},{"label":"Topics","link":"https:\/\/innovationspace.ansys.com\/forum\/topics\/"},{"label":"simulating transmission within a phC waveguide &#8211; Lumerical FDTD","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulating-transmission-within-a-phc-waveguide-lumerical-fdtd-2\/"}],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["340636","2592"],"_bbp_author_ip":["23.206.193.146"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["493"],"_bbp_topic_status":["unanswered"],"_edit_lock":["1709661663:290675"],"_bbp_topic_id":["355452"],"_bbp_forum_id":["27833"],"_bbp_engagement":["2592","340636"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["355747"],"_bbp_last_active_id":["355747"],"_bbp_last_active_time":["2024-03-06 19:03:42"],"_bbp_notification_enabled":["706994"]},"test":"im1n21soton-ac-uk"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/355452","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\/355452\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=355452"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}