{"id":163180,"date":"2021-10-18T17:09:45","date_gmt":"2021-10-18T17:09:45","guid":{"rendered":"\/forum\/forums\/topic\/total-internal-reflection-dielectric-interface-boundary-conditions\/"},"modified":"2022-05-28T14:32:41","modified_gmt":"2022-05-28T14:32:41","slug":"total-internal-reflection-dielectric-interface-boundary-conditions","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/total-internal-reflection-dielectric-interface-boundary-conditions\/","title":{"rendered":"Total Internal Reflection &#8211; Dielectric Interface &#8211; Boundary Conditions"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hi,<\/p>\n<p>I&#039;m trying to observe total internal reflection in a slab interface, it quite a simple structure, but I&#039;m not sure why I&#039;m not able to get the proper results.<\/p>\n<p> I&#039;m setting up an HFSS simulation where I include two slabs one glass (eps_r = 5.5) and another vacuum (eps_r=1). Then I surround the structure with Lattice Pair boundary conditions and specify a phase shift of &#039;theta0&#039; (incidence angle), which is the variable I&#039;m going to sweep. Then, at the bottom face, I set a Floquet port (FP1) that touches the glass slab and at the top, I have a second Floquet port (FP2) that touches the vacuum slab.<\/p>\n<p>I make sure that the A and B dimensions of the unit cell are small enough so only the fundamental modes are propagating.<\/p>\n<p>For TE and TM (m=0, n=0) I do get the correct results that match with Fresnel coefficients only for the case where the wave is incident from n1=1 to n2=sqrt(5.5) (n1&lt;n2):<\/p>\n<div class=\"embedExternal embedImage\">\n<div class=\"embedExternal-content\">\n<a class=\"embedImage-link\" href=\"\/forum\/wp-content\/uploads\/forum-uploads\/730\/69E2RE44LXGX.png\" rel=\"nofollow noopener\" target=\"_blank\"><br \/>\n<img decoding=\"async\" class=\"embedImage-img\" src=\"\/forum\/wp-content\/uploads\/forum-uploads\/730\/69E2RE44LXGX.png\" alt=\"Screen Shot 2021-10-18 at 1.07.25 PM.png\" \/><br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-163180","topic","type-topic","status-closed","hentry","topic-tag-floquet-ports-2","topic-tag-hfss","topic-tag-periodic-boundary","topic-tag-plane-wave","topic-tag-radiation-boundary-2"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":[""],"_bbp_view_count":["296"],"_bbp_likes_count":["1","1"],"_bbp_forum_subforum_count":["0"],"_btv_view_count":["1919"],"_bbpmt_movedon":["2022-07-01 16:47:50"],"_bbpmt_movedfrom":["151970"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["163180"],"_bbp_forum_id":["27793"],"_bbp_engagement":["28551","186251","256963"],"_bbp_voice_count":["3"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["195122"],"_bbp_last_active_id":["195122"],"_bbp_last_active_time":["2022-05-28 14:32:41"]},"test":"joaonizer"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/163180","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\/163180\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=163180"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}