{"id":29440,"date":"2018-04-25T09:58:15","date_gmt":"2018-04-25T07:58:15","guid":{"rendered":"https:\/\/www.iemn.fr\/?page_id=29440"},"modified":"2025-05-16T11:48:10","modified_gmt":"2025-05-16T09:48:10","slug":"ephoni","status":"publish","type":"page","link":"https:\/\/www.iemn.fr\/en\/la-recherche\/les-groupes\/physique\/ephoni","title":{"rendered":"EPHONI"},"content":{"rendered":"<div id='layer_slider_1'  class='avia-layerslider main_color avia-shadow  avia-builder-el-0  el_before_av_submenu  avia-builder-el-first  container_wrap sidebar_right'  style='height: 261px;'  ><div id=\"layerslider_52_1bwfz7n2hzgpz\" 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\/2018\/11\/sliders_groupe_physique.jpg\" class=\"ls-bg\" alt=\"\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/11\/sliders_groupe_physique.jpg 2600w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/11\/sliders_groupe_physique-300x31.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/11\/sliders_groupe_physique-768x80.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/11\/sliders_groupe_physique-1030x107.jpg 1030w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/11\/sliders_groupe_physique-1500x156.jpg 1500w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/11\/sliders_groupe_physique-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;background-position:0% 0%;background-repeat:no-repeat;mix-blend-mode:normal;top:231px;left:0px;height:30px;width:350px;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-user-circle\" style=\"color:#f2f2f2;margin-right:0.8em;font-size:1em;transform:translateY( -0.125em );\"><\/i>GROUPE DE RECHERCHE : PHYSIQUE<\/ls-layer><\/div><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\/2018\/12\/sliders_groupe_physique2.jpg\" class=\"ls-bg\" alt=\"\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/12\/sliders_groupe_physique2.jpg 2600w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/12\/sliders_groupe_physique2-300x31.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/12\/sliders_groupe_physique2-768x80.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/12\/sliders_groupe_physique2-1030x107.jpg 1030w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/12\/sliders_groupe_physique2-1500x156.jpg 1500w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/12\/sliders_groupe_physique2-705x73.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;background-position:0% 0%;background-repeat:no-repeat;mix-blend-mode:normal;top:231px;left:0px;height:30px;width:350px;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-user-circle\" style=\"color:#f2f2f2;margin-right:0.8em;font-size:1em;transform:translateY( -0.125em );\"><\/i>GROUPE DE RECHERCHE : PHYSIQUE<\/ls-layer><\/div><\/div><\/div>\n<div id='sub_menu1'  class='av-submenu-container av-jrqfadqy-ce2f2ab09b07c9cd48b0b2cdd423b7d9 footer_color  avia-builder-el-1  el_after_av_layerslider  el_before_av_one_full  submenu-not-first container_wrap sidebar_right' style='z-index:301' ><div class='container av-menu-mobile-disabled av-submenu-pos-left'><ul id='av-custom-submenu-1' class='av-subnav-menu' role='menu'>\n<li class='menu-item av-3b8nwsr-3adfee6b871674e46730054f5e6bb82f menu-item-top-level menu-item-top-level-1' role='menuitem'><a href='https:\/\/www.iemn.fr\/en\/la-recherche\/les-groupes\/physique'  ><span class='avia-bullet'><\/span><span class='avia-menu-text'>Introduction<\/span><\/a><\/li>\n<li class='menu-item av-9lzktn-2d98f0da28fbfe18b4d07477d4d2a6b1 menu-item-top-level menu-item-top-level-2' role='menuitem'><a href='https:\/\/www.iemn.fr\/en\/la-recherche\/les-groupes\/physique\/ephoni'  ><span class='avia-bullet'><\/span><span class='avia-menu-text'>EPHONI <\/span><\/a><\/li>\n<li class='menu-item av-12xpep7-63fc73235f1da7ae856f01ff27847548 menu-item-top-level menu-item-top-level-3' role='menuitem'><a href='https:\/\/www.iemn.fr\/en\/la-recherche\/les-groupes\/physique\/nanostructures-quantum'  ><span class='avia-bullet'><\/span><span class='avia-menu-text'>PNQD<\/span><\/a><\/li>\n<li class='menu-item av-1zonysr-301be469f3c5e31ac61447e74ef7987e menu-item-top-level menu-item-top-level-4' role='menuitem'><a href='https:\/\/www.iemn.fr\/en\/la-recherche\/les-groupes\/physique\/namaste'  ><span class='avia-bullet'><\/span><span class='avia-menu-text'>NAMASTE <\/span><\/a><\/li>\n<li class='menu-item av-1jtretn-3b2993156cf5b8dc7da2eb31b5f2f85c menu-item-top-level menu-item-top-level-5' role='menuitem'><a href='https:\/\/www.iemn.fr\/en\/la-recherche\/les-groupes\/physique\/nanoacoustique'  ><span class='avia-bullet'><\/span><span class='avia-menu-text'>NANOACOUSTICS<\/span><\/a><\/li>\n<li class='menu-item av-1546b6a-9a596027475e6d2da3b75314796eb4e7 menu-item-top-level menu-item-top-level-6' role='menuitem'><a href='https:\/\/www.iemn.fr\/en\/la-recherche\/les-groupes\/physique\/hopast'  ><span class='avia-bullet'><\/span><span class='avia-menu-text'>HOPAST<\/span><\/a><\/li>\n<\/ul><\/div><\/div><div id='after_submenu_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-29440'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-14zw274-6ba09d23bb627f4ce705212ffcb70c06\">\n.flex_column.av-14zw274-6ba09d23bb627f4ce705212ffcb70c06{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-14zw274-6ba09d23bb627f4ce705212ffcb70c06 av_one_full  avia-builder-el-2  el_after_av_submenu  avia-builder-el-no-sibling  first flex_column_div av-zero-column-padding'     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-p55xpc-823df049fac4f9ea569d120429941bae\">\n#top .av-special-heading.av-p55xpc-823df049fac4f9ea569d120429941bae{\npadding-bottom:10px;\n}\nbody .av-special-heading.av-p55xpc-823df049fac4f9ea569d120429941bae .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-p55xpc-823df049fac4f9ea569d120429941bae .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-p55xpc-823df049fac4f9ea569d120429941bae av-special-heading-h2  avia-builder-el-3  el_before_av_textblock  avia-builder-el-first'><h2 class='av-special-heading-tag'  itemprop=\"headline\"  >EPHONI : Research Activities<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-jo5sn737-4e118ce538041db8ca653f50f7fa5320'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>The EPHONI\u2019s activities focuses on three main scientific themes relating to waves and their interactions in micro- and nanostructures :<\/p>\n<ul>\n<li>Phononics and acoustic metamaterials<\/li>\n<li>Photonic \/ Plasmonics<\/li>\n<li>PhoXonics and Optomecanics<\/li>\n<\/ul>\n<p>The aim is to highlight the fundamental physical properties and\/or behaviour of devices for applications (in telecommunications, sensors, energy, textiles) using analytical and numerical calculations.<\/p>\n<p>Contact: Yan PENNEC. <em>Yan.pennec <img loading=\"lazy\" decoding=\"async\" class=\"align=absbottom wp-image-73424\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2035\/05\/arobase_noir.png\" alt=\"\" width=\"14\" height=\"14\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2035\/05\/arobase_noir.png 24w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2035\/05\/arobase_noir-12x12.png 12w\" sizes=\"auto, (max-width: 14px) 100vw, 14px\" \/> univ-lille.fr<\/em><\/p>\n<h4>Phononic<\/h4>\n<\/div><\/section><br \/>\n<div  class='togglecontainer av-maqm7j4h-3d769b858ad11700ec1c72878b839aba  avia-builder-el-5  el_after_av_textblock  el_before_av_textblock' >\n<section class='av_toggle_section av-av_toggle-b48b74eb1e7bd0b4077ec0f1dc799324'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div role=\"tablist\" class=\"single_toggle\" data-tags=\"{All} \"  ><p id='toggle-toggle-id-1' data-fake-id='#toggle-id-1' class='toggler  activeTitle av-title-above'  itemprop=\"headline\"  role='tab' tabindex='0' aria-controls='toggle-id-1' data-slide-speed=\"200\" data-title=\"Pillar based structures\" data-title-open=\"\" data-aria_collapsed=\"Click to expand: Pillar based structures\" data-aria_expanded=\"Click to collapse: Pillar based structures\">Pillar based structures<span class=\"toggle_icon\"><span class=\"vert_icon\"><\/span><span class=\"hor_icon\"><\/span><\/span><\/p><div id='toggle-id-1' aria-labelledby='toggle-toggle-id-1' role='region' class='toggle_wrap  active_tc av-title-above' style='display:block;' ><div class='toggle_content invers-color'  itemprop=\"text\" ><p><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/12\/ephoni_research1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-29467 size-full\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/12\/ephoni_research1.png\" alt=\"\" width=\"204\" height=\"183\" \/><\/a>We investigated acoustic metasurfaces consisting of either single pillars or lines of identical pillars on a thin plate, used to scatter incident Lamb waves. Depending on the geometrical parameters, the monopolar (compressional) and dipolar (bending) resonances of the pillars can be excited individually or superposed [Phys Rev B 2016]. We are currently working on the demonstration of refractive properties of such structures, with application to the subwavelength focusing of elastic waves. We also presented new designs of pillars for a high confinement of local resonances, in particular the case of hollow pillars for whispering gallery modes [Phys Rev B 2016]. We investigate the case of pillars made by a multilayered material on semi-infinite substrate (see figure) [Phys Rev Applied 2018] and show physical properties as Fano resonances interactions, or acoustic induced transparency for SAW (surface acoustic waves).<\/p>\n<\/div><\/div><\/div><\/section>\n<section class='av_toggle_section av-av_toggle-33eebeedc16a7601208f8a2930693a53'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div role=\"tablist\" class=\"single_toggle\" data-tags=\"{All} \"  ><p id='toggle-toggle-id-2' data-fake-id='#toggle-id-2' class='toggler  av-title-above'  itemprop=\"headline\"  role='tab' tabindex='0' aria-controls='toggle-id-2' data-slide-speed=\"200\" data-title=\"Phononic sensors\" data-title-open=\"\" data-aria_collapsed=\"Click to expand: Phononic sensors\" data-aria_expanded=\"Click to collapse: Phononic sensors\">Phononic sensors<span class=\"toggle_icon\"><span class=\"vert_icon\"><\/span><span class=\"hor_icon\"><\/span><\/span><\/p><div id='toggle-id-2' aria-labelledby='toggle-toggle-id-2' role='region' class='toggle_wrap  av-title-above'  ><div class='toggle_content invers-color'  itemprop=\"text\" ><p><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/12\/ephoni_research2_phononic_sensors.png\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-29470 size-full alignright\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/12\/ephoni_research2_phononic_sensors.png\" alt=\"\" width=\"191\" height=\"179\" \/><\/a>We studied the properties of mixed phononic crystals and acoustic metamaterials for which at least one of the component is a fluid. The results have been applied to the detection of bio-chemical analytes with high sensitivity. We took benefit of different physical behaviors like band gap shifts, cavity and Fano resonances. As an example, we investigated theoretically the properties of phononic crystal plates with hollow pillars, used for sensing the acoustic properties of the fluid or their variations with temperature [Crystals 2016].<\/p>\n<\/div><\/div><\/div><\/section>\n<section class='av_toggle_section av-av_toggle-27ed8ec5688e28d1c0632d18cda4da66'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div role=\"tablist\" class=\"single_toggle\" data-tags=\"{All} \"  ><p id='toggle-toggle-id-3' data-fake-id='#toggle-id-3' class='toggler  av-title-above'  itemprop=\"headline\"  role='tab' tabindex='0' aria-controls='toggle-id-3' data-slide-speed=\"200\" data-title=\"GRIN lenses\" data-title-open=\"\" data-aria_collapsed=\"Click to expand: GRIN lenses\" data-aria_expanded=\"Click to collapse: GRIN lenses\">GRIN lenses<span class=\"toggle_icon\"><span class=\"vert_icon\"><\/span><span class=\"hor_icon\"><\/span><\/span><\/p><div id='toggle-id-3' aria-labelledby='toggle-toggle-id-3' role='region' class='toggle_wrap  av-title-above'  ><div class='toggle_content invers-color'  itemprop=\"text\" ><p><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/12\/ephoni_research3_grin_lenses.png\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-29473 alignright\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/12\/ephoni_research3_grin_lenses.png\" alt=\"\" width=\"261\" height=\"170\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/12\/ephoni_research3_grin_lenses.png 261w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/12\/ephoni_research3_grin_lenses-260x170.png 260w\" sizes=\"auto, (max-width: 261px) 100vw, 261px\" \/><\/a>The subwavelength focalization in a current issue in the field of metamaterials. We developed an original method based on an effective medium approach [Sci. Rep. 2016] for the design of gradient index (GRIN) devices for elastic waves in plates. The method allows controlling the simultaneous propagation of three fundamental Lamb modes. It has been applied to the design of Luneburg, Maxwell and flat gradient index lenses.<\/p>\n<\/div><\/div><\/div><\/section>\n<\/div><br \/>\n<section  class='av_textblock_section av-jpcm4xmd-2eba2e29fcf5103645fca2ffa71aaaef'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" >\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-w0jjk0-5f43a2646af090c3f310adb36e86ac19\">\n#top .hr.hr-invisible.av-w0jjk0-5f43a2646af090c3f310adb36e86ac19{\nheight:20px;\n}\n<\/style>\n<div  class='hr av-w0jjk0-5f43a2646af090c3f310adb36e86ac19 hr-invisible  avia-builder-el-7  avia-builder-el-no-sibling'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<h4>Plasmonic<\/h4>\n<\/div><\/section><br \/>\n<div  class='togglecontainer av-6kx0bk-54f62b83ef1a509c1adf1d0d2ea843a2  avia-builder-el-8  el_after_av_textblock  el_before_av_textblock' >\n<section class='av_toggle_section av-11hsg9s-60427f40cb4929999bf7438a2d1d1e21'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div role=\"tablist\" class=\"single_toggle\" data-tags=\"{All} \"  ><p id='toggle-toggle-id-4' data-fake-id='#toggle-id-4' class='toggler  activeTitle av-title-above'  itemprop=\"headline\"  role='tab' tabindex='0' aria-controls='toggle-id-4' data-slide-speed=\"200\" data-title=\"Plasmonic refractive index and deformation sensing\" data-title-open=\"\" data-aria_collapsed=\"Click to expand: Plasmonic refractive index and deformation sensing\" data-aria_expanded=\"Click to collapse: Plasmonic refractive index and deformation sensing\">Plasmonic refractive index and deformation sensing<span class=\"toggle_icon\"><span class=\"vert_icon\"><\/span><span class=\"hor_icon\"><\/span><\/span><\/p><div id='toggle-id-4' aria-labelledby='toggle-toggle-id-4' role='region' class='toggle_wrap  active_tc av-title-above' style='display:block;' ><div class='toggle_content invers-color'  itemprop=\"text\" ><p>Arrays of metal particles supported on a dielectric\/metal film supporting \"metal-insulator-metal\" surface plasmon modes have been studied for sensing purposes, with bulk index sensitivity among the highest to date [Sci. Rep. 2015] (coll. LNIO, UTT, Troyes). Deformation sensors have also been investigated, based on the interaction of localized plasmons with grazing diffracted waves [JPCC 2017], or local plasmons confined between nanorods on an elastomeric substrate [ACS Appl. Nanomat 2018].<\/p>\n<\/div><\/div><\/div><\/section>\n<section class='av_toggle_section av-wkda00-b65c943747155ccfb4938c85ea5cd00a'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div role=\"tablist\" class=\"single_toggle\" data-tags=\"{All} \"  ><p id='toggle-toggle-id-5' data-fake-id='#toggle-id-5' class='toggler  av-title-above'  itemprop=\"headline\"  role='tab' tabindex='0' aria-controls='toggle-id-5' data-slide-speed=\"200\" data-title=\"Design of A-SNOM probe for TERS applications\" data-title-open=\"\" data-aria_collapsed=\"Click to expand: Design of A-SNOM probe for TERS applications\" data-aria_expanded=\"Click to collapse: Design of A-SNOM probe for TERS applications\">Design of A-SNOM probe for TERS applications<span class=\"toggle_icon\"><span class=\"vert_icon\"><\/span><span class=\"hor_icon\"><\/span><\/span><\/p><div id='toggle-id-5' aria-labelledby='toggle-toggle-id-5' role='region' class='toggle_wrap  av-title-above'  ><div class='toggle_content invers-color'  itemprop=\"text\" ><p>A collaboration has been initiated in 2014 between IEMN and HORIBA FRANCE for designing a new generation of metal plasmonic probes for AFM \/ Tip Enhanced Raman Spectroscopy (AFM-TERS). The probes have been patented (FR3050033 2017-10-13 BOPI 2017-41), and are fabricated and characterized at IEMN (coll. NAM6 group, IEMN and HORIBA FRANCE, joint ANR project TIPTOP).<\/p>\n<\/div><\/div><\/div><\/section>\n<\/div><br \/>\n<section  class='av_textblock_section av-jpcm92ll-34e01ad1d870e71aa21063257cd0c0ae'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" >\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-w4h05c-521eecbbf382c22026eb7c76f28e3338\">\n#top .hr.hr-invisible.av-w4h05c-521eecbbf382c22026eb7c76f28e3338{\nheight:20px;\n}\n<\/style>\n<div  class='hr av-w4h05c-521eecbbf382c22026eb7c76f28e3338 hr-invisible  avia-builder-el-10  avia-builder-el-no-sibling'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<h4>Optomechanic: phonon\/photon and phonon\/plasmon interaction.<\/h4>\n<p>In the frame of the FP7 project TAILPHOX, we investigated the existence of dual phononic\/photonic band gaps, and developed a methodology where the acousto-optic coupling is described on the photo-elastic and moving Interface mechanisms [Nat. Comm. 2014, Nanophotonics 2014, Phys. Rev. B 2013]. Some highlights are proposed below :<\/p>\n<\/div><\/section><br \/>\n<div  class='togglecontainer av-jpcmf5lc-7462b9f1f56418de4a93215abd1149a7  avia-builder-el-11  el_after_av_textblock  avia-builder-el-last' >\n<section class='av_toggle_section av-lfz9og-ad5f2a13e8e7c7cbfb10c47da9489b32'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div role=\"tablist\" class=\"single_toggle\" data-tags=\"{All} \"  ><p id='toggle-toggle-id-6' data-fake-id='#toggle-id-6' class='toggler  activeTitle av-title-above'  itemprop=\"headline\"  role='tab' tabindex='0' aria-controls='toggle-id-6' data-slide-speed=\"200\" data-title=\"Phonon-photon\" data-title-open=\"\" data-aria_collapsed=\"Click to expand: Phonon-photon\" data-aria_expanded=\"Click to collapse: Phonon-photon\">Phonon-photon<span class=\"toggle_icon\"><span class=\"vert_icon\"><\/span><span class=\"hor_icon\"><\/span><\/span><\/p><div id='toggle-id-6' aria-labelledby='toggle-toggle-id-6' role='region' class='toggle_wrap  active_tc av-title-above' style='display:block;' ><div class='toggle_content invers-color'  itemprop=\"text\" ><p><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/12\/ephoni_research4_phonon_photon.png\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-29482 alignright\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/12\/ephoni_research4_phonon_photon.png\" alt=\"\" width=\"453\" height=\"222\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/12\/ephoni_research4_phonon_photon.png 453w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/12\/ephoni_research4_phonon_photon-300x147.png 300w\" sizes=\"auto, (max-width: 453px) 100vw, 453px\" \/><\/a>We participate in the H2020 project PHENOMEN, with the goal to engineer more complex on-chip phonon networks utilizing guided mechanical waves to connect optomechanical systems. Our contribution has been to consider the acoustic wave propagation in a corrugated nanobeam structure containing two coupled phononic cavities [Phys Rev B 2017]. The coupling of their localized modes can be used to modulate the frequency and the quality factors of the cavity modes and affect their contributions to transmission.<\/p>\n<hr \/>\n<p><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/12\/ephoni_research5.png\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-29484 alignright\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2018\/12\/ephoni_research5.png\" alt=\"\" width=\"279\" height=\"228\" \/><\/a>In the frame of the Phenomen project, we also proposed a benchmark system that provides a good predictability of the collective phenomena and controllability of chaotic dynamics at low-power threshold. The proposal system is formed by two optomechanical cavities, one has gain and the other with losses, which are mechanically coupled. Depending on the driving strength and the mechanical coupling term , phase transitions occur (see figure), and the system switches from weak to strong coupling regimes, leading respectively to phase locking or synchronization, and Rabi or chaotic behavior.<\/p>\n<\/div><\/div><\/div><\/section>\n<section class='av_toggle_section av-ps34hs-e72b9e5c7bc780be99112938632c65b9'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div role=\"tablist\" class=\"single_toggle\" data-tags=\"{All} \"  ><p id='toggle-toggle-id-7' data-fake-id='#toggle-id-7' class='toggler  av-title-above'  itemprop=\"headline\"  role='tab' tabindex='0' aria-controls='toggle-id-7' data-slide-speed=\"200\" data-title=\"Phonon\/plasmon interaction\" data-title-open=\"\" data-aria_collapsed=\"Click to expand: Phonon\/plasmon interaction\" data-aria_expanded=\"Click to collapse: Phonon\/plasmon interaction\">Phonon\/plasmon interaction<span class=\"toggle_icon\"><span class=\"vert_icon\"><\/span><span class=\"hor_icon\"><\/span><\/span><\/p><div id='toggle-id-7' aria-labelledby='toggle-toggle-id-7' role='region' class='toggle_wrap  av-title-above'  ><div class='toggle_content invers-color'  itemprop=\"text\" ><p>We have recently started to investigate the interaction of localized surface plasmon modes with elastic waves in model systems, where the optical properties of bi or tri-dimensional particles are modulated by the moving-interface mechanism. For example: how a metal nanowire interacts with the band gap of a two-dimensional grating of holes [AIP Advances 2016]; or, how a three-dimensional system of metal nanocylinders interacts with a metal-insulator-metal plasmon resonance [Phys Rev B 2016].<\/p>\n<\/div><\/div><\/div><\/section>\n<section class='av_toggle_section av-jbtxeo-54bd6a410682da9c696b1c48d8797bff'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div role=\"tablist\" class=\"single_toggle\" data-tags=\"{All} \"  ><p id='toggle-toggle-id-8' data-fake-id='#toggle-id-8' class='toggler  av-title-above'  itemprop=\"headline\"  role='tab' tabindex='0' aria-controls='toggle-id-8' data-slide-speed=\"200\" data-title=\"Brillouin scattering\" data-title-open=\"\" data-aria_collapsed=\"Click to expand: Brillouin scattering\" data-aria_expanded=\"Click to collapse: Brillouin scattering\">Brillouin scattering<span class=\"toggle_icon\"><span class=\"vert_icon\"><\/span><span class=\"hor_icon\"><\/span><\/span><\/p><div id='toggle-id-8' aria-labelledby='toggle-toggle-id-8' role='region' class='toggle_wrap  av-title-above'  ><div class='toggle_content invers-color'  itemprop=\"text\" ><p>Due to recent advances in nanofabrication techniques, submicron phononic crystals can reach the hypersonic (GHz) regime and allow for the interaction of light and sound in the same structure. We studied, both theoretically and experimentally using Brillouin Light Scattering (BLS) in collaboration with G. Fytas from Max Planck Institute of Mainz, hypersonic band features in new organic\/inorganic periodic stacks. We investigate the propagation of surface acoustic waves parallel and perpendicular to a one-dimensional (1D) phononic crystal constituted by high aspect ratio epoxy nanoridges deposited at the surface of a glass substrate for propagation both parallel and perpendicular to the nanoridges. Filling the nanoridge structure with a viscous liquid produces new modes which propagate along the 1D finite height multilayer array.<\/p>\n<\/div><\/div><\/div><\/section>\n<\/div><\/p><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":0,"parent":26098,"menu_order":10,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-29440","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/pages\/29440","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=29440"}],"version-history":[{"count":2,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/pages\/29440\/revisions"}],"predecessor-version":[{"id":73496,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/pages\/29440\/revisions\/73496"}],"up":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/pages\/26098"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=29440"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}