{"id":1899,"date":"2024-10-28T11:18:09","date_gmt":"2024-10-28T10:18:09","guid":{"rendered":"https:\/\/www.fresnel.fr\/wp\/?post_type=rcmo&p=1899"},"modified":"2025-01-06T17:21:46","modified_gmt":"2025-01-06T16:21:46","slug":"adjustable-colour-structures","status":"publish","type":"rcmo","link":"https:\/\/www.fresnel.fr\/wp\/en\/rcmo\/themes\/multilayer-structures-and-colour-control\/adjustable-colour-structures\/","title":{"rendered":"Adjustable colour structures"},"content":{"rendered":"

Les traitements optiques multicouches repr\u00e9sentent la technique la plus commun\u00e9ment utilis\u00e9e pour le contr\u00f4le des propri\u00e9t\u00e9s spectrales de la lumi\u00e8re dans l\u2019industrie (cosm\u00e9tique, automobile, \u00e9l\u00e9ments de s\u00e9curit\u00e9). Ces structures repr\u00e9sentent donc une solution naturelle pour le contr\u00f4le de la couleur. La r\u00e9alisation de structures colorim\u00e9triques \u00e0 forte saturation requiert la fabrication de structures \u00e0 base de couches di\u00e9lectriques et m\u00e9talliques. Or les mat\u00e9riaux m\u00e9talliques en couches minces pr\u00e9sentent des propri\u00e9t\u00e9s de dispersion difficiles \u00e0 ma\u00eetriser et \u00e0 caract\u00e9riser.<\/p>\n

L\u2019\u00e9quipe RCMO s\u2019int\u00e9resse \u00e0 l\u2019\u00e9tude de ces fines couches m\u00e9talliques et a d\u00e9velopp\u00e9 des techniques robustes de caract\u00e9risation de celles-ci. A l\u2019aide de ces r\u00e9sultats, des structures multicouches sont d\u00e9velopp\u00e9es avec un rendu colorim\u00e9trique contr\u00f4lable par changement de l\u2019incidence de l\u2019\u00e9clairage. Ces r\u00e9sultats ont permis de d\u00e9velopper de nouvelles solutions pour les \u00e9l\u00e9ments de s\u00e9curit\u00e9 des billets de banque et le d\u00e9p\u00f4t d\u2019un brevet associ\u00e9. L\u2019ajout de mat\u00e9riaux \u00e0 changement de phase est \u00e9galement \u00e0 l\u2019\u00e9tude afin de rendre ce changement de couleur actif soit par une variation de temp\u00e9rature, soit une excitation laser ou \u00e9lectrique.<\/p>\n

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Exemple de structures multicouches colorim\u00e9triques d\u00e9pos\u00e9es sur diff\u00e9rents supports<\/figcaption><\/figure>\n

Contacts\u00a0:<\/strong> Fabien Lemarchand\/Antonin Moreau\/Julien Lumeau (RCMO)<\/p>\n","protected":false},"author":15,"featured_media":0,"parent":1896,"menu_order":21,"template":"","thematique":[32],"class_list":{"0":"post-1899","1":"rcmo","2":"type-rcmo","3":"status-publish","5":"entry"},"acf":[],"lang":"en","translations":{"en":1899,"fr":831},"pll_sync_post":[],"_links":{"self":[{"href":"https:\/\/www.fresnel.fr\/wp\/wp-json\/wp\/v2\/rcmo\/1899","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fresnel.fr\/wp\/wp-json\/wp\/v2\/rcmo"}],"about":[{"href":"https:\/\/www.fresnel.fr\/wp\/wp-json\/wp\/v2\/types\/rcmo"}],"author":[{"embeddable":true,"href":"https:\/\/www.fresnel.fr\/wp\/wp-json\/wp\/v2\/users\/15"}],"version-history":[{"count":0,"href":"https:\/\/www.fresnel.fr\/wp\/wp-json\/wp\/v2\/rcmo\/1899\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/www.fresnel.fr\/wp\/wp-json\/wp\/v2\/rcmo\/1896"}],"wp:attachment":[{"href":"https:\/\/www.fresnel.fr\/wp\/wp-json\/wp\/v2\/media?parent=1899"}],"wp:term":[{"taxonomy":"thematique","embeddable":true,"href":"https:\/\/www.fresnel.fr\/wp\/wp-json\/wp\/v2\/thematique?post=1899"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}