{"id":275518,"date":"2023-03-20T09:34:04","date_gmt":"2023-03-20T09:34:04","guid":{"rendered":"\/forum\/forums\/topic\/fdtd-simulation-of-a-gold-nanorod-placed-on-inp-waveguide\/"},"modified":"2023-03-20T09:34:04","modified_gmt":"2023-03-20T09:34:04","slug":"fdtd-simulation-of-a-gold-nanorod-placed-on-inp-waveguide","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fdtd-simulation-of-a-gold-nanorod-placed-on-inp-waveguide\/","title":{"rendered":"FDTD: simulation of a gold nanorod placed on InP waveguide"},"content":{"rendered":"<p>Hi,<\/p>\n<p>I have been running FDTD simulations involving a gold nanorod on an InP waveguide.<\/p>\n<p>XZ plane view:<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/03\/17-03-2023-1679072927-mceclip0.png\"><\/p>\n<p>XY plane view:<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/03\/17-03-2023-1679073561-mceclip3.png\"><\/p>\n<p>Below I show the normalized power transmittance at monitor 2 (labeled above):<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/03\/17-03-2023-1679073663-mceclip4.png\"><\/p>\n<p>These oscillations should not be existing (they indicate the presence of a Fabry Perot cavity).<\/p>\n<p>I have verified the PML layers properly and performed the convergence test. Further, it seems that the mode source is acting like a reflector forming a cavity between the mode source and the nanorod.<\/p>\n<p>As you can see below, the power transmittance at monitor 2 is shown for different gaps between the nanorod and the mode source. The oscillation frequency increases with an increasing gap between the source and the nanorod.<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/03\/17-03-2023-1679073994-mceclip5.png\"><\/p>\n<p>&nbsp;<\/p>\n<p>Can you comment on this and help me solve this issue?<\/p>\n<p>Let me know if you have more questions or if more clarification is needed.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-275518","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["102556","2592"],"_bbp_author_ip":["23.192.164.21"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["524"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["275518"],"_bbp_forum_id":["27833"],"_bbp_engagement":["2592","102556"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["275646"],"_bbp_last_active_id":["275646"],"_bbp_last_active_time":["2023-03-20 23:25:00"]},"test":"n-narendrastudent-tue-nl"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/275518","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\/275518\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=275518"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}