{"id":372810,"date":"2024-07-19T19:27:21","date_gmt":"2024-07-19T19:27:21","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/372810\/"},"modified":"2024-07-19T19:27:21","modified_gmt":"2024-07-19T19:27:21","slug":"372810","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/372810\/","title":{"rendered":"Reply To: Material is not fitted properly and might be giving problems with convergence"},"content":{"rendered":"<p>&lt;p&gt;The fitting mechanism is to ensure the causality. Thus it has special requirement for the fitting. Lumerical multi-coefficient material mode works the best for most natural materials. However in some cases it can be challenge such as your case.&nbsp;&lt;\/p&gt;&lt;p&gt;You may reduce the number of coefficients (as 20 does not work now),&nbsp; try the advanced fitting feature to use smaller weight factor to enhance the real part fitting. Some tips can be found here:&lt;\/p&gt;&lt;p&gt;<a href=\"https:\/\/optics.ansys.com\/hc\/en-us\/search\/click?data=BAh7DjoHaWRsKwjt0sDTUwA6D2FjY291bnRfaWRpA02AjDoJdHlwZUkiDGFydGljbGUGOgZFVDoIdXJsSSJ0aHR0cHM6Ly9vcHRpY3MuYW5zeXMuY29tL2hjL2VuLXVzL2FydGljbGVzLzM2MDAzNDkxNTA1My1UaXBzLWZvci1pbXByb3ZpbmctdGhlLXF1YWxpdHktb2Ytb3B0aWNhbC1tYXRlcmlhbC1maXRzBjsIVDoOc2VhcmNoX2lkSSIpYzkzNTA3ZTAtZmJlMi00Y2RhLTg2ZWItYjg1ZjZkMzA1Y2U1BjsIRjoJcmFua2kGOgtsb2NhbGVJIgplbi11cwY7CFQ6CnF1ZXJ5SSIVbWF0ZXJpYWwgZml0dGluZwY7CFQ6EnJlc3VsdHNfY291bnRpAugD--96d27d430ac0ba4e22862ce870747a88d964bb23\">Tips for improving the quality of optical material fits<\/a>&lt;\/p&gt;&lt;p&gt;<a href=\"https:\/\/optics.ansys.com\/hc\/en-us\/search\/click?data=BAh7DjoHaWRsKwjZ0sDTUwA6D2FjY291bnRfaWRpA02AjDoJdHlwZUkiDGFydGljbGUGOgZFVDoIdXJsSSIBfmh0dHBzOi8vb3B0aWNzLmFuc3lzLmNvbS9oYy9lbi11cy9hcnRpY2xlcy8zNjAwMzQ5MTUwMzMtVXNpbmctdGhlLU1hdGVyaWFsLUV4cGxvcmVyLXRvLXZpZXctYW5kLWFkanVzdC1vcHRpY2FsLW1hdGVyaWFsLW1vZGVscwY7CFQ6DnNlYXJjaF9pZEkiKWM5MzUwN2UwLWZiZTItNGNkYS04NmViLWI4NWY2ZDMwNWNlNQY7CEY6CXJhbmtpCDoLbG9jYWxlSSIKZW4tdXMGOwhUOgpxdWVyeUkiFW1hdGVyaWFsIGZpdHRpbmcGOwhUOhJyZXN1bHRzX2NvdW50aQLoAw%3D%3D--5d0f4fc75fb41f9cb3a92c6bec356c62c6d5d1a5\">Using the Material Explorer to view and adjust optical material models<\/a>&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-372810","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"The fitting mechanism is to ensure the causality. Thus it has special requirement for the fitting. Lumerical multi-coefficient material mode works the best for most natural materials. However in some cases it can be challenge such as your case. You may reduce the number of coefficients (as 20 does not work now), try the advanced fitting\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/372810\/\" \/>\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=\"Reply To: Material is not fitted properly and might be giving problems with convergence | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"The fitting mechanism is to ensure the causality. Thus it has special requirement for the fitting. Lumerical multi-coefficient material mode works the best for most natural materials. However in some cases it can be challenge such as your case. You may reduce the number of coefficients (as 20 does not work now), try the advanced fitting\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/372810\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2024-07-19T19:27:21+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2024-07-19T19:27:21+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Reply To: Material is not fitted properly and might be giving problems with convergence | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"The fitting mechanism is to ensure the causality. Thus it has special requirement for the fitting. Lumerical multi-coefficient material mode works the best for most natural materials. However in some cases it can be challenge such as your case. 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