{"id":346461,"date":"2024-01-25T00:47:26","date_gmt":"2024-01-25T00:47:26","guid":{"rendered":"\/forum\/forums\/topic\/diffraction-orders-of-grating-coupler\/"},"modified":"2024-01-25T00:57:23","modified_gmt":"2024-01-25T00:57:23","slug":"diffraction-orders-of-grating-coupler","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/diffraction-orders-of-grating-coupler\/","title":{"rendered":"Diffraction orders of grating coupler"},"content":{"rendered":"

Hello, I need help figuring out how to estimate the number of orders scattered by a dielectic grating coupler with a waveguide mode input. When I use the grating function on a field monitor above a uniform sub-wavelength grating coupler I see a very large number of orders (>800) which doesn’t seem correct to me. <\/p>\n

Any idea what could be going wrong? <\/p>\n

Here is the cross-section view: <\/a><\/p>\n

Thanks! <\/p>\n","protected":false},"template":"","class_list":["post-346461","topic","type-topic","status-closed","hentry","topic-tag-BraggGrating-1","topic-tag-dielectric-waveguide","topic-tag-diffraction-1","topic-tag-gratingcoupler-1","topic-tag-lumerical","topic-tag-LumericalFDTD-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["337639","18532"],"_bbp_author_ip":["96.7.74.191"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["293"],"_bbp_topic_status":["unanswered"],"_edit_lock":["1706144137:285442"],"_bbp_topic_id":["346461"],"_bbp_forum_id":["27833"],"_bbp_engagement":["18532","337639"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["347323"],"_bbp_last_active_id":["347323"],"_bbp_last_active_time":["2024-01-30 15:45:12"]},"test":"htiyer2illinois-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/346461","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":2,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/346461\/revisions"}],"predecessor-version":[{"id":346465,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/346461\/revisions\/346465"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=346461"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}