{"id":373694,"date":"2024-07-25T21:08:09","date_gmt":"2024-07-25T21:08:09","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/inverse-design-freezing-issue\/"},"modified":"2024-07-25T21:08:09","modified_gmt":"2024-07-25T21:08:09","slug":"inverse-design-freezing-issue","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/inverse-design-freezing-issue\/","title":{"rendered":"Inverse Design Freezing Issue"},"content":{"rendered":"<div>Hello,<\/div>\n<div>&nbsp;<\/div>\n<div>I am having a problem with running codes using the inverse design method in Lumerical. I want to use this method to optimize an MMI structure (like the Y_branch example, https:\/\/optics.ansys.com\/hc\/en-us\/articles\/360042305274-Inverse-design-of-y-branch) by using 400 iterations. I used 3D FDTD solver to optimizs a structure 10 microns long. Some other parameters are: dx = 1e-09, pgtol = 1e-09, ftol = 1e-09, scaling_factor = 1e9, mesh size_y = 30nm, and mesh size_x = 50nm (changing the mesh size does not affect the problem).<\/div>\n<div>&nbsp;<\/div>\n<div>When I run the code, it gets stuck and freezes after around 30 iterations. It also runs some iterations more than 8 times. Is this a problem with the code or with my system?<\/div>\n<div>&nbsp;<\/div>\n<div>My system information is: cores: 64, Logical processors: 128, Physical memory: 256 GB.<\/div>\n<div>&nbsp;<\/div>\n<div>I would appreciate it if you could help me.<\/div>\n<div>&nbsp;<\/div>\n<div>Thank you,<\/div>\n<div>Fatemeh<\/div>\n","protected":false},"template":"","class_list":["post-373694","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["40604","2592"],"_bbp_author_ip":["132.170.212.17"]," _bbp_last_reply_id":["0"],"_btv_view_count":["293"]," _bbp_likes_count":["0"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["373694"],"_bbp_forum_id":["27833"],"_bbp_engagement":["2592","40604"],"_bbp_voice_count":["2"],"_bbp_reply_count":["6"],"_bbp_last_reply_id":["378039"],"_bbp_last_active_id":["378039"],"_bbp_last_active_time":["2024-08-13 01:16:47"]},"test":"fa146088ucf-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/373694","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\/373694\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=373694"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}