{"id":162516,"date":"2021-09-23T22:27:27","date_gmt":"2021-09-23T22:27:27","guid":{"rendered":"\/forum\/forums\/topic\/need-help-with-this-fdtd-simulation-of-2d-materials-and-metals\/"},"modified":"2021-10-26T04:38:41","modified_gmt":"2021-10-26T04:38:41","slug":"need-help-with-this-fdtd-simulation-of-2d-materials-and-metals","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/need-help-with-this-fdtd-simulation-of-2d-materials-and-metals\/","title":{"rendered":"Need help with this FDTD simulation of 2D materials and metals"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hello,<\/p>\n<p>We are trying to calculate the Reflectance spectrum for a layered structure. The materials we are using are mos2, mose2, silver on a glass substrate. <\/p>\n<p>The structure consists of a monolayer of mos2 or mose2 placed on a glass substrate. A silver layer of 50nm is laid on top of mos2\/mose2. The silver has an etch at its center. Then we shine light in the 400 nm to 800nm wavelength range to get the reflection spectrum. <\/p>\n<p>We have tested the simulation with just the 2D materials, or just silver, and good results (reproduced experimental reflectance spectrum), but when we use them all together most of the time the simulation diverges. I have played with the step size, dt, mesh accuracy and mesh refinement parameters but the simulation still diverges. So far only one simulation with mose2 has finished but the results don&#039;t make sense as the Reflection spectrum goes up to 10000.<\/p>\n<p><\/p>\n<\/p>\n<p>I am attaching pictures of the simulation setup here. If someone can take a look and tell us what we are doing wrong it will be a great help.<\/p>\n<p>With regards<\/p>\n<p>Anikeya<\/p>\n<div class=\"embedExternal embedImage\">\n<div class=\"embedExternal-content\">\n<a class=\"embedImage-link\" href=\"\/forum\/wp-content\/uploads\/forum-uploads\/709\/SAGS8GDH19SF.png\" rel=\"nofollow noopener\" target=\"_blank\"><br \/>\n<img decoding=\"async\" class=\"embedImage-img\" src=\"\/forum\/wp-content\/uploads\/forum-uploads\/709\/SAGS8GDH19SF.png\" alt=\"Screenshot 2021-09-23 152458.png\" \/><br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-162516","topic","type-topic","status-closed","hentry","topic-tag-2d-materials-and-metals-1","topic-tag-Divergingfields-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":[""],"_bbp_view_count":["296"],"_bbp_likes_count":["0","0"],"_bbp_forum_subforum_count":["0"],"_btv_view_count":["842"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["162516"],"_bbp_forum_id":["27833"],"_bbp_engagement":["2592","192300"],"_bbp_voice_count":["2"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["192978"],"_bbp_last_active_id":["192978"],"_bbp_last_active_time":["2021-10-26 04:38:41"]},"test":"aadityausc-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/162516","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\/162516\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=162516"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}