{"id":387799,"date":"2024-10-02T10:49:00","date_gmt":"2024-10-02T10:49:00","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/hfss-transmission-in-rf-ir-and-visible\/"},"modified":"2024-10-02T10:49:00","modified_gmt":"2024-10-02T10:49:00","slug":"hfss-transmission-in-rf-ir-and-visible","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/hfss-transmission-in-rf-ir-and-visible\/","title":{"rendered":"HFSS Transmission in RF, IR and Visible"},"content":{"rendered":"<p>&lt;p&gt;Hello,&lt;\/p&gt;&lt;p&gt;I chose to simulate metasurface designs in HFSS as it provided experimentally verified simulation results in the RF. Now, I want to expand my simulation range to cover the IR and visible regimes too.&lt;\/p&gt;&lt;p&gt;When I&#8217;m doing this, the transmission values I am getting appear to include large amounts of thin film interference, which I do not see in my experimental results. I am using two periodic boundary conditions, floquet ports above and below (with 5um gap between my structure and port), custom materials based on conductivity values, and a driven solution mode. The maximum pitch of my periodc structures is 1mm. Do I need to take into account some other considerations when moving into the IR and visible regimes with HFSS?&nbsp;&lt;\/p&gt;&lt;p&gt;In adition, the simulation time increases substationally when moving to the higher freuqnecies. I did expect this as the mesh size used will be smaller. I should note I am using three individual studies with the adaptive pass \/ meshing frequency set to the highest value in each study. Example: study 1 goes from 1-15 GHz and so adaptive pass frequency is 15 GHz. How could I ensure that I speed up simulations without losing out on accuracy?&lt;\/p&gt;&lt;p&gt;Many thanks in advance, Tom.&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-387799","topic","type-topic","status-publish","hentry","topic-tag-hfss","topic-tag-infrared","topic-tag-rf-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["464319","467013","109997","534588"],"_bbp_author_ip":["152.78.0.22"],"_btv_view_count":["485"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["387799"],"_bbp_forum_id":["27793"],"_bbp_engagement":["109997","464319","467013","534588"],"_bbp_voice_count":["4"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["427153"],"_bbp_last_active_id":["427153"],"_bbp_last_active_time":["2025-03-28 04:06:27"]},"test":"t-m-howesoton-ac-uk"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/387799","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\/387799\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=387799"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}