{"id":230906,"date":"2022-08-10T18:03:02","date_gmt":"2022-08-10T18:03:02","guid":{"rendered":"\/forum\/forums\/topic\/convergence-for-tm-modes-in-rcwa\/"},"modified":"2022-08-14T16:37:10","modified_gmt":"2022-08-14T16:37:10","slug":"convergence-for-tm-modes-in-rcwa","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/convergence-for-tm-modes-in-rcwa\/","title":{"rendered":"Convergence for TM Polarization in RCWA"},"content":{"rendered":"<p>Hi all. I have been trying to run simulations with Lumerical&#8217;s RCWA script to calculate device reflection and transmission for simple optical stacks. While my results for TE are fairly accurate and converge quickly, my results for TM polarization take a large amount of modes to converge (still doesn&#8217;t converge after 600 modes). I am wondering whether anyone else has ran into this problem and what they have done to solve it. Thanks!<a class=\"wp-colorbox-image cboxElement\" href=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/08\/10-08-2022-1660154548-RCWA_convergenceTestingTE.png\"><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/08\/10-08-2022-1660154548-RCWA_convergenceTestingTE.png\" alt=\"\"><\/a><\/p>\n","protected":false},"template":"","class_list":["post-230906","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 all. I have been trying to run simulations with Lumerical&#039;s RCWA script to calculate device reflection and transmission for simple optical stacks. While my results for TE are fairly accurate and converge quickly, my results for TM polarization take a large amount of modes to converge (still doesn&#039;t converge after 600 modes). I am\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/convergence-for-tm-modes-in-rcwa\/\" \/>\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=\"Convergence for TM Polarization in RCWA | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hi all. I have been trying to run simulations with Lumerical&#039;s RCWA script to calculate device reflection and transmission for simple optical stacks. While my results for TE are fairly accurate and converge quickly, my results for TM polarization take a large amount of modes to converge (still doesn&#039;t converge after 600 modes). I am\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/convergence-for-tm-modes-in-rcwa\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2022\/08\/10-08-2022-1660154548-RCWA_convergenceTestingTE.png\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2022\/08\/10-08-2022-1660154548-RCWA_convergenceTestingTE.png\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2022-08-10T18:03:02+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2022-08-14T16:37:10+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Convergence for TM Polarization in RCWA | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Hi all. I have been trying to run simulations with Lumerical&#039;s RCWA script to calculate device reflection and transmission for simple optical stacks. While my results for TE are fairly accurate and converge quickly, my results for TM polarization take a large amount of modes to converge (still doesn&#039;t converge after 600 modes). I am\" \/>\n\t\t<meta name=\"twitter:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2022\/08\/10-08-2022-1660154548-RCWA_convergenceTestingTE.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\\\/convergence-for-tm-modes-in-rcwa\\\/#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\\\/convergence-for-tm-modes-in-rcwa\\\/#listItem\",\"name\":\"Convergence for TM Polarization in RCWA\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/convergence-for-tm-modes-in-rcwa\\\/#listItem\",\"position\":3,\"name\":\"Convergence for TM Polarization in RCWA\",\"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\\\/convergence-for-tm-modes-in-rcwa\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/convergence-for-tm-modes-in-rcwa\\\/\",\"name\":\"Convergence for TM Polarization in RCWA | Ansys Learning Forum\",\"description\":\"Hi all. I have been trying to run simulations with Lumerical's RCWA script to calculate device reflection and transmission for simple optical stacks. While my results for TE are fairly accurate and converge quickly, my results for TM polarization take a large amount of modes to converge (still doesn't converge after 600 modes). 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I have been trying to run simulations with Lumerical's RCWA script to calculate device reflection and transmission for simple optical stacks. While my results for TE are fairly accurate and converge quickly, my results for TM polarization take a large amount of modes to converge (still doesn't converge after 600 modes). 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I have been trying to run simulations with Lumerical's RCWA script to calculate device reflection and transmission for simple optical stacks. While my results for TE are fairly accurate and converge quickly, my results for TM polarization take a large amount of modes to converge (still doesn't converge after 600 modes). I am","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#website"},"breadcrumb":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/convergence-for-tm-modes-in-rcwa\/#breadcrumblist"},"datePublished":"2022-08-10T18:03:02+00:00","dateModified":"2022-08-14T16:37:10+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":"Convergence for TM Polarization in RCWA | Ansys Learning Forum","og:description":"Hi all. I have been trying to run simulations with Lumerical's RCWA script to calculate device reflection and transmission for simple optical stacks. While my results for TE are fairly accurate and converge quickly, my results for TM polarization take a large amount of modes to converge (still doesn't converge after 600 modes). I am","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/convergence-for-tm-modes-in-rcwa\/","og:image":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2022\/08\/10-08-2022-1660154548-RCWA_convergenceTestingTE.png","og:image:secure_url":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2022\/08\/10-08-2022-1660154548-RCWA_convergenceTestingTE.png","article:published_time":"2022-08-10T18:03:02+00:00","article:modified_time":"2022-08-14T16:37:10+00:00","twitter:card":"summary_large_image","twitter:title":"Convergence for TM Polarization in RCWA | Ansys Learning Forum","twitter:description":"Hi all. I have been trying to run simulations with Lumerical's RCWA script to calculate device reflection and transmission for simple optical stacks. While my results for TE are fairly accurate and converge quickly, my results for TM polarization take a large amount of modes to converge (still doesn't converge after 600 modes). 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