{"id":361931,"date":"2024-04-12T11:43:02","date_gmt":"2024-04-12T11:43:02","guid":{"rendered":"\/forum\/?post_type=topic&#038;p=361931"},"modified":"2024-04-12T11:45:27","modified_gmt":"2024-04-12T11:45:27","slug":"how-to-calculate-the-transmission-coefficients-in-fdtd-for-rcp-or-lcp-incidence","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-calculate-the-transmission-coefficients-in-fdtd-for-rcp-or-lcp-incidence\/","title":{"rendered":"How to calculate the Transmission coefficients in FDTD for RCP or LCP incidence?"},"content":{"rendered":"<p><span style=\"font-size: 12pt\"><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/12-04-2024-1712922169-CM2.png\" alt=\"\"><img decoding=\"async\" title=\"This is the code I used to get the plot (second way)\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/12-04-2024-1712921663-Screenshot 2024-04-12 165919.png\" alt=\"\"><img decoding=\"async\" title=\"Transmission for different handedness\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/12-04-2024-1712920648-Screenshot 2024-04-12 163135.png\" alt=\"\"><\/span><\/p>\n<p><span style=\"font-size: 12pt\">I am reproducing the results of the paper titled &#8220;All-dielectric planar chiral metasurface with gradient geometric phase&#8221;, In this paper, they are shining the RCP &amp; LCP light in the backward direction from Air to Substrate on the unit cell, and they are getting the following graph. I have attached the unit cell and the transmission graph too! I am using the s_parameter analysis group to do this study! I have added one more source to the S_parameter analysis group with a polarization angle of 90 degrees and a phase of &#8211;<img loading=\"lazy\" decoding=\"async\" title=\"This is the simulation setup for the first way\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/12-04-2024-1712921480-Screenshot 2024-04-12 165432.png\" alt=\"\" width=\"921\" height=\"586\">90 degrees. I have seen the Transmission from the Transmission monitor (T) placed within the Analysis group. The results I got do not match the Author&#8217;s results. This is one way I tried, the other way is, I used the S_Polarization results, after simulating the unit cell with x and y polarised light separately and then using some steps in the script (also attached to the discussion) I got a plot. The plot I got still did not match the one in the paper. Can anyone help me with this?&nbsp;<\/span><\/p>\n<p><span style=\"font-size: 12pt\"><img decoding=\"async\" title=\"Unitcell\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/12-04-2024-1712920409-Screenshot 2024-04-12 163029.png\" alt=\"\"><\/span><\/p>\n","protected":false},"template":"","class_list":["post-361931","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":["23.52.43.81"],"_bbp_subscription":["302729","2592"],"_btv_view_count":["727"],"_bbp_topic_status":["unanswered"],"_edit_lock":["1712923147:244844"],"_bbp_topic_id":["361931"],"_bbp_forum_id":["27833"],"_bbp_engagement":["2592","302729"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["362010"],"_bbp_last_active_id":["362010"],"_bbp_last_active_time":["2024-04-12 16:31:22"],"_bbp_likes_count":["1"]},"test":"ph23resch01002iith-ac-in"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/361931","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":6,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/361931\/revisions"}],"predecessor-version":[{"id":361942,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/361931\/revisions\/361942"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=361931"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}