{"id":75326,"date":"2025-10-02T15:22:43","date_gmt":"2025-10-02T13:22:43","guid":{"rendered":"https:\/\/www.iemn.fr\/?page_id=75326"},"modified":"2025-10-02T15:22:43","modified_gmt":"2025-10-02T13:22:43","slug":"projet-anr-unicorn-dispositifs-unipolaires-a-haute-efficacite-a-base-de-micro-cavites","status":"publish","type":"page","link":"https:\/\/www.iemn.fr\/en\/projet-anr-unicorn-dispositifs-unipolaires-a-haute-efficacite-a-base-de-micro-cavites","title":{"rendered":"Projet ANR &#8211; UNICORN : Dispositifs unipolaires \u00e0 haute efficacit\u00e9 \u00e0 base de micro-cavit\u00e9s"},"content":{"rendered":"<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-obgwup-e849561b42eb2866e0aa5229228349dd\">\n.flex_column.av-obgwup-e849561b42eb2866e0aa5229228349dd{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-obgwup-e849561b42eb2866e0aa5229228349dd av_one_full  avia-builder-el-0  el_before_av_one_full  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width=\"300\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2022\/06\/logo_anr.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2022\/06\/logo_anr-18x5.jpg 18w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l48hejsx-e4793490ff2a2a809d51b2d1d36f4496\">\n.flex_column.av-l48hejsx-e4793490ff2a2a809d51b2d1d36f4496{\nborder-radius:20px 20px 20px 20px;\npadding:10px 10px 10px 10px;\nbackground-color:#ebb401;\n}\n<\/style>\n<div  class='flex_column av-l48hejsx-e4793490ff2a2a809d51b2d1d36f4496 av_one_full  avia-builder-el-2  el_after_av_one_full  el_before_av_one_full  first flex_column_div  column-top-margin'     ><section  class='av_textblock_section av-l48hdtga-50380e38c85ad2e1915c9650e85ebb6d'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h3 style=\"text-align: center;\">Projet ANR xxxxx<\/h3>\n<\/div><\/section><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lkgiy9-6fe9252508a87bef590816866096ff99\">\n.flex_column.av-lkgiy9-6fe9252508a87bef590816866096ff99{\nborder-radius:0px 0px 0px 0px;\npadding:20px 0px 20px 0px;\n}\n<\/style>\n<div  class='flex_column av-lkgiy9-6fe9252508a87bef590816866096ff99 av_one_full  avia-builder-el-4  el_after_av_one_full  el_before_av_textblock  first flex_column_div  column-top-margin'     ><section  class='av_textblock_section av-l48g5n3e-1551bed9ef7e820e4f83d8e2482ed0e9'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h4>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-b8f4c22e6bbeb9225144fbb1e9b8c6d8\">\n.av_font_icon.av-mqde7m-b8f4c22e6bbeb9225144fbb1e9b8c6d8{\ncolor:#ebb401;\nborder-color:#ebb401;\n}\n.av_font_icon.av-mqde7m-b8f4c22e6bbeb9225144fbb1e9b8c6d8 .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-b8f4c22e6bbeb9225144fbb1e9b8c6d8 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='\ue889' data-av_iconfont='entypo-fontello' ><\/span><\/span>UNICORN<\/h4>\n<h5>Ultra-efficient, microcavity-coupled non-linear unipolar devices<\/h5>\n<p>Dispositifs unipolaires \u00e0 haute efficacit\u00e9 \u00e0 base de micro-cavit\u00e9s<\/p>\n<\/div><\/section><\/div><section  class='av_textblock_section av-l48g64e5-d7772cf38373e1395e19db96febaa039'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p><strong><span style=\"color: #800000;\">TRADUCTION EN FRAN\u00c7AIS FAITE AVEC DEEPL : \u00c0 V\u00c9RIFIER <\/span><\/strong><\/p>\n<p>Les ph\u00e9nom\u00e8nes optiques non lin\u00e9aires (NL) jouent un r\u00f4le important dans l&rsquo;imagerie biologique avanc\u00e9e, la d\u00e9tection, les communications et la conception de nouvelles sources de lumi\u00e8re coh\u00e9rentes pomp\u00e9es par laser. Dans la gamme de l&rsquo;infrarouge moyen (MIR), des travaux r\u00e9cents sur la g\u00e9n\u00e9ration de fr\u00e9quences NL exploitent les transitions intersubbandes dans des h\u00e9t\u00e9rostructures quantiques III-V coupl\u00e9es \u00e0 des microcavit\u00e9s photoniques et des m\u00e9tamat\u00e9riaux. Cette approche est libre des contraintes de correspondance de phase requises par les architectures de guides d&rsquo;ondes, tout en offrant une am\u00e9lioration du signal NL gr\u00e2ce \u00e0 la pr\u00e9sence de la microcavit\u00e9. Dans UNICORN, nous proposons un nouveau type de dispositifs unipolaires NL coupl\u00e9s \u00e0 une microcavit\u00e9, qui tirent parti non seulement des effets de microcavit\u00e9, mais aussi des effets \u00e9lectroniques collectifs apparaissant dans le r\u00e9gime des tr\u00e8s hautes densit\u00e9s \u00e9lectroniques. Ce dernier degr\u00e9 de libert\u00e9 a \u00e9t\u00e9 n\u00e9glig\u00e9 jusqu&rsquo;\u00e0 pr\u00e9sent, mais une th\u00e9orie quantique que nous avons r\u00e9cemment d\u00e9velopp\u00e9e pour les ph\u00e9nom\u00e8nes NL dans ce r\u00e9gime estime une am\u00e9lioration de plusieurs ordres de grandeur des performances des dispositifs par rapport \u00e0 l&rsquo;\u00e9tat de l&rsquo;art, tant en termes d&rsquo;efficacit\u00e9 de conversion que d&rsquo;efficacit\u00e9 quantique d&rsquo;absorption. Sur la base de ces connaissances, nous visons deux objectifs. Tout d&rsquo;abord, la d\u00e9monstration de photod\u00e9tecteurs MIR \u00e0 deux photons et \u00e0 puits quantiques multiples fonctionnant \u00e0 10 um \u00e0 temp\u00e9rature ambiante. Par rapport aux photod\u00e9tecteurs conventionnels, nous esp\u00e9rons r\u00e9duire leur courant d&rsquo;obscurit\u00e9 \u00e0 300 K de plusieurs ordres de grandeur, tout en conservant des niveaux de r\u00e9activit\u00e9 similaires. Notre deuxi\u00e8me objectif est la d\u00e9monstration de sources coh\u00e9rentes MIR (4-6 \u00b5m) et t\u00e9rahertz (100-200 \u00b5m) bas\u00e9es respectivement sur la g\u00e9n\u00e9ration de seconde harmonique et de fr\u00e9quence diff\u00e9rentielle, avec des rendements sup\u00e9rieurs de plusieurs ordres de grandeur \u00e0 ceux des sources \u00e0 semi-conducteurs \u00e0 microcavit\u00e9 NL actuelles, en tirant parti du fort couplage lumi\u00e8re-mati\u00e8re et des effets \u00e9lectroniques collectifs.<\/p>\n<hr \/>\n<p>Nonlinear (NL) optical phenomena play an important role for advanced bio-imaging, sensing, communications, and in the conception of novel laser-pumped coherent sources of light. In the mid-infrared (MIR) range, recent works on NL frequency generation exploit intersubband transitions in III-V quantum heterostructures coupled to photonic microcavities and metamaterials. This approach is free from the phase-matching constraints required by waveguide architectures, while, additionally, providing an enhancement of the NL signal thanks to the presence of the microcavity. In UNICORN, we propose a new type of microcavity-coupled NL unipolar devices, which takes advantage not only of microcavity effects but also of the collective electronic effects appearing in the regime of very high electronic densities. This last degree of freedom has been overlooked so far, however a quantum theory that we developed recently for NL phenomena in this regime estimates orders of magnitude improvement in device performance compared to the state of the art, both in terms of conversion efficiency and absorption quantum efficiency. Based on this knowledge, we target two objectives. First, the demonstration of room temperature, two-photon MIR multi-quantum-well photo-detectors operating at 10um. Compared to conventional photodetectors, we expect to reduce their dark current at 300K by several orders of magnitude, still keeping similar levels of responsivity. Our second objective is the demonstration of MIR (4-6um) and Terahertz (100-200um) coherent sources based respectively on second harmonic and difference frequency generation, with several orders of magnitude higher efficiencies compared to present NL microcavity semiconductor sources, by leveraging on strong light-matter coupling and collective electronic effects.<span class=\"Apple-converted-space\">\u00a0<\/span><\/p>\n<\/div><\/section><\/p>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lkgiy9-6fe9252508a87bef590816866096ff99\">\n.flex_column.av-lkgiy9-6fe9252508a87bef590816866096ff99{\nborder-radius:0px 0px 0px 0px;\npadding:20px 0px 20px 0px;\n}\n<\/style>\n<div  class='flex_column av-lkgiy9-6fe9252508a87bef590816866096ff99 av_one_full  avia-builder-el-8  el_after_av_textblock  el_before_av_one_half  first flex_column_div  column-top-margin'     ><section  class='av_textblock_section av-l48g5n3e-d14dff6097a6073ddf6a61e5992886d8'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h4>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-b8f4c22e6bbeb9225144fbb1e9b8c6d8\">\n.av_font_icon.av-mqde7m-b8f4c22e6bbeb9225144fbb1e9b8c6d8{\ncolor:#ebb401;\nborder-color:#ebb401;\n}\n.av_font_icon.av-mqde7m-b8f4c22e6bbeb9225144fbb1e9b8c6d8 .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-b8f4c22e6bbeb9225144fbb1e9b8c6d8 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='\ue889' data-av_iconfont='entypo-fontello' ><\/span><\/span>Partners<\/h4>\n<h5><\/h5>\n<\/div><\/section><\/div>\n<div class='flex_column_table av-237o9w1-e31f98e4cf06d668c03c0d3978576c28 sc-av_one_half av-equal-height-column-flextable'>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-237o9w1-e31f98e4cf06d668c03c0d3978576c28\">\n@keyframes av_boxShadowEffect_av-237o9w1-e31f98e4cf06d668c03c0d3978576c28-column {\n0%   { box-shadow:  0 0 0 0 #d3d3d3; opacity: 1; }\n100% { box-shadow:  0 0 10px 0 #d3d3d3; opacity: 1; }\n}\n.flex_column.av-237o9w1-e31f98e4cf06d668c03c0d3978576c28{\nbox-shadow: 0 0 10px 0 #d3d3d3;\nborder-width:2px;\nborder-color:#cccccc;\nborder-style:solid;\nborder-radius:10px 10px 10px 10px;\npadding:20px 20px 20px 20px;\n}\n<\/style>\n<div  class='flex_column av-237o9w1-e31f98e4cf06d668c03c0d3978576c28 av_one_half  avia-builder-el-11  el_after_av_one_full  el_before_av_one_half  first flex_column_table_cell av-equal-height-column av-align-bottom shadow-not-animated  column-top-margin'     ><section  class='av_textblock_section av-l48gdxv4-001b415f9b481b71bb8f83f4347101b1'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h4><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2020\/09\/logo_iemn_def.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-42329\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2020\/09\/logo_iemn_def-300x110.jpg\" alt=\"\" width=\"300\" height=\"110\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2020\/09\/logo_iemn_def-300x110.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2020\/09\/logo_iemn_def.jpg 340w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/h4>\n<h4><strong>Institut d\u2019Electronique, de Micro\u00e9lectronique et de Nanotechnologie, IEMN<\/strong><\/h4>\n<h5><em>Coordinateur : S. Barbieri\u00a0<\/em><\/h5>\n<\/div><\/section><\/div><div class='av-flex-placeholder'><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-237o9w1-7b69530381d1b97bd96abd8a80c1793f\">\n@keyframes av_boxShadowEffect_av-237o9w1-7b69530381d1b97bd96abd8a80c1793f-column {\n0%   { box-shadow:  0 0 0 0 #d3d3d3; opacity: 1; }\n100% { box-shadow:  0 0 10px 0 #d3d3d3; opacity: 1; }\n}\n.flex_column.av-237o9w1-7b69530381d1b97bd96abd8a80c1793f{\nbox-shadow: 0 0 10px 0 #d3d3d3;\nborder-width:2px;\nborder-color:#cccccc;\nborder-style:solid;\nborder-radius:10px 10px 10px 10px;\npadding:20px 20px 20px 20px;\n}\n<\/style>\n<div  class='flex_column av-237o9w1-7b69530381d1b97bd96abd8a80c1793f av_one_half  avia-builder-el-13  el_after_av_one_half  el_before_av_one_full  flex_column_table_cell av-equal-height-column av-align-bottom shadow-not-animated  column-top-margin'     ><section  class='av_textblock_section av-l48gdxv4-001b415f9b481b71bb8f83f4347101b1'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h4><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/10\/espci_paris.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-75327\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/10\/espci_paris.jpg\" alt=\"\" width=\"400\" height=\"70\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/10\/espci_paris.jpg 600w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/10\/espci_paris-300x53.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/10\/espci_paris-18x3.jpg 18w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/a><\/h4>\n<h4>ESPCI Paris<\/h4>\n<h5><em>Responsable scientifique : xxxxxxxx<\/em><\/h5>\n<\/div><\/section><\/div><\/div><!--close column table wrapper. Autoclose: 1 -->\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lkgiy9-6fe9252508a87bef590816866096ff99\">\n.flex_column.av-lkgiy9-6fe9252508a87bef590816866096ff99{\nborder-radius:0px 0px 0px 0px;\npadding:20px 0px 20px 0px;\n}\n<\/style>\n<div  class='flex_column av-lkgiy9-6fe9252508a87bef590816866096ff99 av_one_full  avia-builder-el-15  el_after_av_one_half  avia-builder-el-last  first flex_column_div  column-top-margin'     ><section  class='av_textblock_section av-l48g5n3e-d14dff6097a6073ddf6a61e5992886d8'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h4>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-b8f4c22e6bbeb9225144fbb1e9b8c6d8\">\n.av_font_icon.av-mqde7m-b8f4c22e6bbeb9225144fbb1e9b8c6d8{\ncolor:#ebb401;\nborder-color:#ebb401;\n}\n.av_font_icon.av-mqde7m-b8f4c22e6bbeb9225144fbb1e9b8c6d8 .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-b8f4c22e6bbeb9225144fbb1e9b8c6d8 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='\ue889' data-av_iconfont='entypo-fontello' ><\/span><\/span>Publications<\/h4>\n<h5><\/h5>\n<\/div><\/section><\/div><\/p>","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-75326","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/pages\/75326","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/types\/page"}],"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=75326"}],"version-history":[{"count":2,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/pages\/75326\/revisions"}],"predecessor-version":[{"id":75339,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/pages\/75326\/revisions\/75339"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=75326"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}