{"id":1262,"date":"2021-05-12T11:43:17","date_gmt":"2021-05-12T09:43:17","guid":{"rendered":"http:\/\/project.inria.fr\/rencontresljll\/?p=1262"},"modified":"2021-05-12T11:43:17","modified_gmt":"2021-05-12T09:43:17","slug":"monday-17th-may-2021-visio-berangere-delourme-laga-paris-13","status":"publish","type":"post","link":"https:\/\/project.inria.fr\/rencontresljll\/fr\/monday-17th-may-2021-visio-berangere-delourme-laga-paris-13\/","title":{"rendered":"<font color=\"red\"><strong>Lundi 17 mai 2021- Visio<\/strong>  <\/font><br> <strong> B\u00e9rang\u00e8re Delourme (LAGA Paris 13) <\/strong>."},"content":{"rendered":"<p>Titre : Modes guid\u00e9s dans des structures p\u00e9riodiques fines en \u2019nid d\u2019abeille\u2019. <\/p>\n<p>Les cristaux photoniques sont des mat\u00e9riaux ayant une structure p\u00e9riodique qui leur permet de contr\u00f4ler la propagation de la lumi\u00e8re. Du fait de la complexit\u00e9 de la structure (reflexions multiples dues \u00e0 la p\u00e9riodicit\u00e9 du mat\u00e9riaux), des ph\u00e9nom\u00e8nes d&rsquo;interf\u00e9rences destructives peuvent apparaitre \u00e0 certaines fr\u00e9quences. Plus pr\u00e9cis\u00e9ment, il existe des intervalles de fr\u00e9quences dans lesquels les rayons lumineux monochromatiques ne peuvent pas se propager. Par ailleurs, l&rsquo;introduction de perturbations lin\u00e9iques dans ces milieux peut g\u00e9n\u00e9rer  des modes guid\u00e9s se propageant le long des perturbations.  Dans cet expos\u00e9, nous \u00e9tudions  des mat\u00e9riaux p\u00e9riodiques &lsquo;en nid d\u2019abeille\u2019 (sym\u00e9trie hexagonale) particuliers constitu\u00e9s d&rsquo;un maillage de tubes minces. Nous montrons quelques propri\u00e9t\u00e9s remarquables de ce milieu : pr\u00e9sence de pointes coniques dans les surfaces de dispersion, cr\u00e9ation de modes guid\u00e9s plats \u00e0 la suite d\u2019une introduction d\u2019un d\u00e9faut lin\u00e9ique en zigzag. Le travail pr\u00e9sent\u00e9 est issu d&rsquo;une collaboration avec Sonia Fliss. <\/p>","protected":false},"excerpt":{"rendered":"<p>Titre : Modes guid\u00e9s dans des structures p\u00e9riodiques fines en \u2019nid d\u2019abeille\u2019. Les cristaux photoniques sont des mat\u00e9riaux ayant une structure p\u00e9riodique qui leur permet de contr\u00f4ler la propagation de la lumi\u00e8re. Du fait de la complexit\u00e9 de la structure (reflexions multiples dues \u00e0 la p\u00e9riodicit\u00e9 du mat\u00e9riaux), des ph\u00e9nom\u00e8nes\u2026<\/p>\n<p> <a class=\"continue-reading-link\" href=\"https:\/\/project.inria.fr\/rencontresljll\/fr\/monday-17th-may-2021-visio-berangere-delourme-laga-paris-13\/\"><span>plus<\/span><i class=\"crycon-right-dir\"><\/i><\/a> <\/p>\n","protected":false},"author":1279,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[],"class_list":["post-1262","post","type-post","status-publish","format-standard","hentry","category-seminaire-2020-2021"],"_links":{"self":[{"href":"https:\/\/project.inria.fr\/rencontresljll\/fr\/wp-json\/wp\/v2\/posts\/1262","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/project.inria.fr\/rencontresljll\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/project.inria.fr\/rencontresljll\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/project.inria.fr\/rencontresljll\/fr\/wp-json\/wp\/v2\/users\/1279"}],"replies":[{"embeddable":true,"href":"https:\/\/project.inria.fr\/rencontresljll\/fr\/wp-json\/wp\/v2\/comments?post=1262"}],"version-history":[{"count":1,"href":"https:\/\/project.inria.fr\/rencontresljll\/fr\/wp-json\/wp\/v2\/posts\/1262\/revisions"}],"predecessor-version":[{"id":1263,"href":"https:\/\/project.inria.fr\/rencontresljll\/fr\/wp-json\/wp\/v2\/posts\/1262\/revisions\/1263"}],"wp:attachment":[{"href":"https:\/\/project.inria.fr\/rencontresljll\/fr\/wp-json\/wp\/v2\/media?parent=1262"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/project.inria.fr\/rencontresljll\/fr\/wp-json\/wp\/v2\/categories?post=1262"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/project.inria.fr\/rencontresljll\/fr\/wp-json\/wp\/v2\/tags?post=1262"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}