{"id":469290,"date":"2025-01-05T19:41:34","date_gmt":"2025-01-05T18:41:34","guid":{"rendered":"https:\/\/www.ecinews.fr\/?p=469290"},"modified":"2025-01-05T19:42:14","modified_gmt":"2025-01-05T18:42:14","slug":"nouveaux-capteurs-infrarouges-a-base-de-cermanium","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/nouveaux-capteurs-infrarouges-a-base-de-cermanium\/","title":{"rendered":"Nouveaux capteurs infrarouges \u00e0 base de germanium"},"content":{"rendered":"

La d\u00e9tection de la lumi\u00e8re infrarouge est essentielle dans un grand nombre de technologies, des t\u00e9l\u00e9commandes aux syst\u00e8mes de mise au point automatique, en passant par les voitures autonomes et les casques de r\u00e9alit\u00e9 virtuelle.<\/span><\/h3>\n

Des chercheurs de l’universit\u00e9 d’Aalto ont mis au point un nouveau type de photodiode infrarouge qui, par rapport \u00e0 d’autres composants \u00e0 base de germanium, est 35 % plus sensible \u00e0 1,55 \u00b5m, la longueur d’onde cl\u00e9 pour les t\u00e9l\u00e9communications. Il est important de noter que ce nouveau dispositif peut \u00eatre fabriqu\u00e9 \u00e0 l’aide des techniques de production actuelles, ce qui le rend tr\u00e8s pratique pour l’adoption.<\/p>\n

Il nous a fallu huit ans pour passer de l’id\u00e9e \u00e0 la validation du concept\u00a0\u00bb, explique Hele Savin, professeur \u00e0 l’universit\u00e9 d’Aalto. <\/em><\/p>\n

L’id\u00e9e de base est de fabriquer les photodiodes en utilisant du germanium au lieu de l’ars\u00e9niure d’indium et de gallium. Les photodiodes au germanium sont moins ch\u00e8res et d\u00e9j\u00e0 enti\u00e8rement compatibles avec le processus de fabrication des semiconducteurs. Cependant, il faut noter que jusqu’\u00e0 pr\u00e9sent, les photodiodes au germanium n’ont pas donn\u00e9 de bons r\u00e9sultats en termes de capture de la lumi\u00e8re infrarouge.<\/p>\n

L’\u00e9quipe de Savin a r\u00e9ussi \u00e0 fabriquer des photodiodes en germanium qui captent la quasi-totalit\u00e9 de la lumi\u00e8re infrarouge re\u00e7ue.<\/p>\n

Les performances \u00e9lev\u00e9es ont \u00e9t\u00e9 rendues possibles par la combinaison de plusieurs approches novatrices : l’\u00e9limination des pertes optiques \u00e0 l’aide de nanostructures de surface et la minimisation des pertes \u00e9lectriques de deux mani\u00e8res diff\u00e9rentes\u00a0\u00bb, explique Hanchen Liu, le chercheur doctorant qui a construit le dispositif de validation du concept.<\/em><\/p>\n

Les tests de l’\u00e9quipe ont montr\u00e9 que leur photodiode de validation du concept surpassait en r\u00e9activit\u00e9 non seulement les photodiodes au germanium existantes, mais aussi les photodiodes actuelles \u00e0 l’ars\u00e9niure d’indium et de gallium. La nouvelle technologie capture tr\u00e8s efficacement les photons infrarouges et fonctionne bien sur une large gamme de longueurs d’onde. Les nouvelles photodiodes peuvent \u00eatre facilement fabriqu\u00e9es dans les installations de production existantes et les chercheurs s’attendent \u00e0 ce qu’elles puissent \u00eatre directement int\u00e9gr\u00e9es dans de nombreuses technologies.<\/p>\n

L’\u00e9tude a \u00e9t\u00e9 publi\u00e9e le 1er janvier 2025 dans la revue Light : Science & Applications.
\nLien vers l’article : www.nature.com\/articles\/s41377-024-01670-4<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

La d\u00e9tection de la lumi\u00e8re infrarouge est essentielle dans un grand nombre de technologies, des t\u00e9l\u00e9commandes aux syst\u00e8mes de mise au point automatique, en passant par les voitures autonomes et les casques de r\u00e9alit\u00e9 virtuelle. Des chercheurs de l’universit\u00e9 d’Aalto ont mis au point un nouveau type de photodiode infrarouge qui, par rapport \u00e0 d’autres […]<\/p>\n","protected":false},"author":7,"featured_media":469277,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[3669,883],"tags":[937,6702],"domains":[47],"ppma_author":[1139],"class_list":["post-469290","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouvelles","category-technologies","tag-capteur","tag-infrarouge","domains-electronique-eci"],"acf":[],"yoast_head":"Construire de meilleurs capteurs infrarouges ...<\/title>\n<meta name=\"description\" content=\"photodiode infrarouge \u00e0 base de germanium, est 35 % plus sensible \u00e0 1,55 \u00b5m, la longueur d'onde cl\u00e9 pour les t\u00e9l\u00e9communications\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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