{"id":37903,"date":"2019-09-25T14:49:54","date_gmt":"2019-09-25T12:49:54","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=37903"},"modified":"2019-10-03T11:58:48","modified_gmt":"2019-10-03T09:58:48","slug":"soutenance-de-these-sara-bretin-communications-aux-frequences-terahertz-applications-a-la-video-haute-definition-temps-reel","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/actualites\/soutenance-de-these-sara-bretin-communications-aux-frequences-terahertz-applications-a-la-video-haute-definition-temps-reel.html","title":{"rendered":"Defense of thesis: Sara BRETIN, Terahertz frequency communications: Applications to real-time high-definition video"},"content":{"rendered":"<div id='layer_slider_1'  class='avia-layerslider main_color avia-shadow  avia-builder-el-0  el_before_av_heading  avia-builder-el-first  container_wrap sidebar_right'  style='height: 261px;'  ><div id=\"layerslider_58_14scjnp6m19x1\" data-ls-slug=\"homepageslider\" class=\"ls-wp-container fitvidsignore ls-selectable\" style=\"width:1140px;height:260px;margin:0 auto;margin-bottom: 0px;\"><div class=\"ls-slide\" data-ls=\"duration:6000;transition2d:5;\"><img loading=\"lazy\" decoding=\"async\" width=\"2600\" height=\"270\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1.jpg\" class=\"ls-bg\" alt=\"\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1.jpg 2600w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-300x31.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-768x80.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-1030x107.jpg 1030w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-1500x156.jpg 1500w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-705x73.jpg 705w\" sizes=\"auto, (max-width: 2600px) 100vw, 2600px\" \/><ls-layer style=\"font-size:14px;text-align:left;font-style:normal;text-decoration:none;text-transform:none;font-weight:700;letter-spacing:0px;border-style:solid;border-color:#000;background-position:0% 0%;background-repeat:no-repeat;width:180px;height:30px;left:0px;top:231px;line-height:32px;color:#ffffff;border-radius:6px 6px 6px 6px;padding-left:50px;background-color:rgba(0, 0, 0, 0.57);\" class=\"ls-l ls-ib-icon ls-text-layer\" data-ls=\"minfontsize:0;minmobilefontsize:0;\"><i class=\"fa fa-quote-right\" style=\"color:#ffffff;margin-right:0.8em;font-size:1em;transform:translateY( -0.125em );\"><\/i>ACTUALITES<\/ls-layer><\/div><\/div><\/div><div id='after_layer_slider_1'  class='main_color av_default_container_wrap container_wrap sidebar_right'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-37903'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-k0z9pnk4-c9095f725079d99a8d445256a49a7dc0\">\n#top .av-special-heading.av-k0z9pnk4-c9095f725079d99a8d445256a49a7dc0{\nmargin:0 0 10px 0;\npadding-bottom:4px;\n}\nbody .av-special-heading.av-k0z9pnk4-c9095f725079d99a8d445256a49a7dc0 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-k0z9pnk4-c9095f725079d99a8d445256a49a7dc0 .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-k0z9pnk4-c9095f725079d99a8d445256a49a7dc0 av-special-heading-h2  avia-builder-el-1  el_after_av_layerslider  el_before_av_hr  avia-builder-el-first'><h2 class='av-special-heading-tag'  itemprop=\"headline\"  >THESE : Communications aux fr\u00e9quences t\u00e9rahertz : Applications \u00e0 la vid\u00e9o haute d\u00e9finition temps r\u00e9el<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-18u73nj-dad6a947580930e400fc42ba200e80f1\">\n#top .hr.av-18u73nj-dad6a947580930e400fc42ba200e80f1{\nmargin-top:5px;\nmargin-bottom:5px;\n}\n.hr.av-18u73nj-dad6a947580930e400fc42ba200e80f1 .hr-inner{\nwidth:100%;\n}\n<\/style>\n<div  class='hr av-18u73nj-dad6a947580930e400fc42ba200e80f1 hr-custom  avia-builder-el-2  el_after_av_heading  el_before_av_textblock  hr-left hr-icon-no'><span class='hr-inner inner-border-av-border-thin'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<section  class='av_textblock_section av-jriy64i8-2f4600354c0449b610997916bbd9b6bc'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" >\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-13ewzjw-68e036126b913e5028f77311dc66b825\">\n.av_font_icon.av-13ewzjw-68e036126b913e5028f77311dc66b825{\ncolor:#bfbfbf;\nborder-color:#bfbfbf;\n}\n.av_font_icon.av-13ewzjw-68e036126b913e5028f77311dc66b825 .av-icon-char{\nfont-size:60px;\nline-height:60px;\n}\n<\/style>\n<span  class='av_font_icon av-13ewzjw-68e036126b913e5028f77311dc66b825 avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue8c9' data-av_iconfont='entypo-fontello' ><\/span><\/span>\n<h5><strong style=\"font-size: 16px;\">Sara BRETIN<\/strong><\/h5>\n<p><strong>Mercredi 25 septembre 2019 \u00e0 14h00<br \/>\n<\/strong>Amphitheatre of the IEMN-Laboratoire central - Villeneuve d'Ascq<\/p>\n<\/div><\/section>\n<section  class='av_textblock_section av-jtefqx33-628129dba2299b2ecd65ebfc92eac29d'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><div  class='hr av-kjh3zw-4dff888f744b728a1aca9b3a0971493a hr-default  avia-builder-el-6  avia-builder-el-no-sibling'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<h5><strong><span style=\"color: #800000;\">Jury:<\/span><\/strong><\/h5>\n<ul>\n<li>Guillaume DUCOURNAU, Professeur Universit\u00e9 de Lille, Directeur de th\u00e8se<\/li>\n<li>Mohammed ZAKNOUNE, Directeur de Recherche, CNRS, Co Directeur de th\u00e8se<\/li>\n<li>Nathalie ROLLAND, Professeur Universit\u00e9 de Lille, Examinateur<\/li>\n<li>Anne-Laure BILLABERT, Ma\u00eetre de Conf\u00e9rences CNAM Paris, Rapporteur<\/li>\n<li>Mohammed HIMDI, Professeur IETR, Rapporteur<\/li>\n<li>St\u00e9phane BLIN, Ma\u00eetre de Conf\u00e9rences, IES Montpellier, Examinateur<\/li>\n<\/ul>\n<h5><span class=\"\">Summary:<\/span><\/h5>\n<p>Les communications aux fr\u00e9quences terahertz sont \u00e9tudi\u00e9es dans un contexte de transmissions en espace libre. L\u2019objectif de la th\u00e8se est de proposer une \u00e9tude comparative de diff\u00e9rentes topologies d\u2019\u00e9lectrodes sup\u00e9rieures appliqu\u00e9es aux photodiodes UTC ainsi qu\u2019un module d\u2019int\u00e9gration de ces composants. Ces composants permettent de r\u00e9aliser des liens de communications sans fils aux fr\u00e9quences t\u00e9rahertz.<\/p>\n<p>Une \u00e9tude bibliographique \u00e9value les domaines d\u2019applications de ces fr\u00e9quences, dont le nombre est croissant cette derni\u00e8re d\u00e9cennie. Les sources t\u00e9rahertz existantes sont ensuite \u00e9tudi\u00e9es en fonction des performances et de leur domaine spectrale d\u2019\u00e9mission. Les photor\u00e9ponses et puissances \u00e9mises pour diff\u00e9rentes structures de photodiodes PIN, UTC et TTR utilis\u00e9es en photom\u00e9langeur sont compar\u00e9es au-del\u00e0 de 60 GHz. Les modules d\u2019int\u00e9grations d\u00e9velopp\u00e9es et les diff\u00e9rentes m\u00e9thodes d\u2019int\u00e9grations sont d\u00e9taill\u00e9s dans la derni\u00e8re partie du premier chapitre. Le second chapitre pr\u00e9sente une \u00e9tude th\u00e9orique, num\u00e9rique et exp\u00e9rimentale des photodiodes UTC r\u00e9alis\u00e9es. L\u2019utilisation d\u2019une \u00e9lectrode sup\u00e9rieure d\u00e9di\u00e9e et l\u2019\u00e9tude de diff\u00e9rents motifs est d\u00e9velopp\u00e9e afin de limiter la d\u00e9pendance \u00e0 la polarisation optique de la structure, afin d\u2019en augmenter la fiabilit\u00e9 dans un contexte de transmission de donn\u00e9es vid\u00e9os aux fr\u00e9quences t\u00e9rahertz. Un module d\u2019int\u00e9gration d\u00e9di\u00e9e, en guide WR-3, pour ces photodiodes, est \u00e9tudi\u00e9 num\u00e9riquement sous le logiciel CST ainsi que les lignes de transmissions au r\u00e9cepteur. Enfin, les liens t\u00e9rahertz r\u00e9alis\u00e9s et les performances correspondantes sont r\u00e9sum\u00e9es dans le dernier chapitre.<\/p>\n<h5><span class=\"\">Abstract:<\/span><\/h5>\n<p>The terahertz frequency communications are studied in a context of free space transmissions. The objective of this thesis is to propose a comparative study of different topologies of top electrode applied to UTC photodiode and a module for packaging this type of components. Those components permit to produce wireless communications links at terahertz frequencies. A bibliographic study evaluates the areas of applications for this frequency band. Then, current terahertz sources are studied according to the performances and their spectral emission domain. The photoresponses and the power emitted for different structures of PIN, UTC, and TTR photodiodes used like photomixer are compared beyond 60 GHz. The packaging and the different modules of integration are detailed in the last part of this first chapter. The second chapter presents a theoretical, numerical and experimental study of UTC photodiodes. The use of a dedicated top contact and the study of different patterns are developed in order to limit the optical polarization dependence of this structure, in order to increase the reliability in a context of data video transmission at terahertz frequencies. A dedicated WR-3 packaging module for these photodiodes is studied numerically under CST software and lines of transmission are studied in receiver. Finally, the terahertz links and the corre-sponding performances are summarized in the last chapter.<\/p>\n<\/div><\/section>","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":37907,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[162,260,257,259,258,256,161],"class_list":["post-37903","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-communications","tag-photodiode","tag-photomelange","tag-photomixer","tag-sans-fils","tag-terahertz","tag-wireless"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/37903","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=37903"}],"version-history":[{"count":0,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/37903\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media\/37907"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=37903"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=37903"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=37903"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}