{"id":11610,"date":"2025-07-07T12:17:33","date_gmt":"2025-07-07T10:17:33","guid":{"rendered":"https:\/\/fermi.univ-tlse3.fr\/?post_type=tribe_events&#038;p=11610"},"modified":"2025-07-09T09:55:18","modified_gmt":"2025-07-09T07:55:18","slug":"high-resolution-mid-infrared-molecular-spectroscopy-for-precision-measurements-and-tests-of-fundamental-physics-mathieu-manceau-lpcno-seminar-11-7-2025-14h","status":"publish","type":"tribe_events","link":"https:\/\/fermi.univ-tlse3.fr\/fr\/home\/event\/high-resolution-mid-infrared-molecular-spectroscopy-for-precision-measurements-and-tests-of-fundamental-physics-mathieu-manceau-lpcno-seminar-11-7-2025-14h\/","title":{"rendered":"High-resolution mid-infrared molecular spectroscopy for precision measurements and tests of fundamental physics. \u2013 (Mathieu Manceau \/ LPCNO \/ Seminar). \u2013 11\/07\/2025, 14H"},"content":{"rendered":"<p><span style=\"font-size: 24px; background-color: #f18500;\">S\u00e9minaire LPCNO<\/span><\/p>\n<p><span style=\"font-size: 20px;\"><span style=\"color: #191970;\"><strong>Mathieu Manceau, <\/strong><\/span>Laboratoire de physique des lasers<\/span><\/p>\n<p><span style=\"background-color: #cecece;\"><strong>Salle de conf\u00e9rence, B\u00e2timent 3R4<br \/>\n<\/strong><\/span><\/p>\n<p><span style=\"font-size: 20px;\"><strong>Abstract<\/strong> <\/span><br \/>\nHigh spectral resolution gas-phase molecular spectroscopy in the mid-infrared (MIR)\u2014the so-called molecular fingerprint region (3 to 25 \u03bcm)\u2014has far-reaching applications, ranging from astrophysics, remote sensing, and Earth sciences to fundamental physics and metrology. Sub-Doppler spectroscopic techniques in the MIR have so far been limited to only a few relatively simple species.<br \/>\nIn this talk, I will present our latest efforts at the Laboratoire de Physique des Lasers to overcome current limitations in MIR frequency metrology. Our goal is to extend frequency metrology methods to an increasing number of species and to enable broadband, sensitive, and ultra-precise spectroscopic studies of molecules relevant to fundamental physics, atmospheric science, and astrophysics.<br \/>\nI will specifically highlight our recent instrumental developments, including ultrastable quantum cascade lasers, advances in MIR photonics, and a new source of cold molecules. I will also discuss our ongoing experiments aimed at testing parity symmetry in chiral molecules, and measuring potential variations in the proton-to-electron mass ratio over time and space.<br \/>\nThese latter measurements, which involve comparing absorption and emission spectra from cosmic sources with laboratory data, are currently limited by the existing laboratory measurements..<\/p>\n<hr \/>\n<div class=\"leaflet-map WPLeafletMap\" style=\"height:300px; width:70%;\"><\/div><script>\nwindow.WPLeafletMapPlugin = window.WPLeafletMapPlugin || [];\nwindow.WPLeafletMapPlugin.push(function WPLeafletMapShortcode() {\/*<script>*\/\nvar baseUrl = atob('aHR0cHM6Ly97c30udGlsZS5vcGVuc3RyZWV0bWFwLm9yZy97en0ve3h9L3t5fS5wbmc=');\nvar base = (!baseUrl && window.MQ) ?\n    window.MQ.mapLayer() : L.tileLayer(baseUrl,\n        L.Util.extend({}, {\n            detectRetina: 0,\n        },\n        {\"subdomains\":\"abc\",\"noWrap\":false,\"maxZoom\":18}        )\n    );\n    var options = L.Util.extend({}, {\n        layers: [base],\n        attributionControl: false\n    },\n    {\"zoomControl\":true,\"scrollWheelZoom\":true,\"doubleClickZoom\":true,\"fitBounds\":true,\"minZoom\":9,\"maxZoom\":18,\"maxBounds\":null,\"attribution\":\"<a href=\\\"http:\\\/\\\/leafletjs.com\\\" title=\\\"Une biblioth\\u00e8que JS pour des cartes interactives\\\">Leaflet<\\\/a>; \\u00a9 <a href=\\\"http:\\\/\\\/www.openstreetmap.org\\\/copyright\\\">OpenStreetMap<\\\/a> contributeurs\"},\n    {});\nwindow.WPLeafletMapPlugin.createMap(options).setView([43.560830727361,1.4672373725804],16);window.WPLeafletMapPlugin.createScale({});});<\/script>\n<script>\nwindow.WPLeafletMapPlugin = window.WPLeafletMapPlugin || [];\nwindow.WPLeafletMapPlugin.push(function WPLeafletMarkerShortcode() {\/*<script>*\/\nvar map = window.WPLeafletMapPlugin.getCurrentMap();\nvar group = window.WPLeafletMapPlugin.getCurrentGroup();\nvar marker_options = window.WPLeafletMapPlugin.getIconOptions({});\nvar marker = L.marker(\n    [0,0],\n    marker_options\n);\nvar is_image = map.is_image_map;\n    marker.setLatLng( map.getCenter() );\nif (marker_options.draggable) {\n    marker.on('dragend', function () {\n        var latlng = this.getLatLng();\n        var lat = latlng.lat;\n        var lng = latlng.lng;\n        if (is_image) {\n            console.log('leaflet-marker y=' + lat + ' x=' + lng);\n        } else {\n            console.log('leaflet-marker lat=' + lat + ' lng=' + lng);\n        }\n    });\n}\nmarker.addTo( group );\nmarker.bindPopup(window.WPLeafletMapPlugin.unescape('Salle de conf\u00e9rence (- B\u00e2timent 3R4)'));window.WPLeafletMapPlugin.markers.push( marker );\n        });<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Salle de conf\u00e9rence, B\u00e2timent 3R4<\/p>\n","protected":false},"author":5,"featured_media":0,"template":"","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","neve_meta_reading_time":"","_tribe_events_status":"","_tribe_events_status_reason":"","footnotes":""},"tags":[],"tribe_events_cat":[48,312,233],"class_list":["post-11610","tribe_events","type-tribe_events","status-publish","hentry","tribe_events_cat-events","tribe_events_cat-lpcno","tribe_events_cat-seminars","cat_events","cat_lpcno","cat_seminars"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - 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