{"id":3149,"date":"2024-03-22T17:57:22","date_gmt":"2024-03-22T16:57:22","guid":{"rendered":"http:\/\/polysense.poliba.it\/?p=3149"},"modified":"2024-03-22T17:57:22","modified_gmt":"2024-03-22T16:57:22","slug":"new-publication-on-light-science-applications-journal","status":"publish","type":"post","link":"https:\/\/polysense.poliba.it\/index.php\/2024\/03\/22\/new-publication-on-light-science-applications-journal\/","title":{"rendered":"New Publication on Light: Science &#038; Applications Journal"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"> The PolySense team has just published\u00a0 a new article on Light: Science &amp; Applications Journal (IF 19.4) reporting on an innovative technique of quartz-enhanced multiheterodyne resonant photoacoustic spectroscopy (QEMR-PAS), in  which the beat frequency response from a dual comb is frequency down-converted into the audio frequency domain. In this way, gas molecules act as an optical-acoustic converter through the photoacoustic effect, generating heterodyne sound waves. Unlike conventional DCS, where the light wave is detected by awavelength dependent photoreceiver, QEMR-PAS employs a quartz tuning fork (QTF) as a high-Q sound transducer and works  in conjunction with a phase-sensitive detector to extract the resonant sound component from the multiple<br> heterodyne acoustic tones, resulting in a straightforward and low-cost hardware configuration. This novel QEMRPAS  technique enables wavelength-independent DCS detection for gas sensing, providing an unprecedented dynamic range of 63 dB, a remarkable spectral resolution of 43 MHz (or ~0.3 pm), and a prominent noise equivalent absorption of 5.99 \u00d7 10-6 cm-1\u00b7Hz-1\/2.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> The following link provides access to the article:     <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/polysense.poliba.it\/wp-content\/uploads\/2024\/03\/QEPAS-dual-comb-Lights-2024.pdf\">http:\/\/polysense.poliba.it\/wp-content\/uploads\/2024\/03\/QEPAS-dual-comb-Lights-2024.pdf<\/a><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" width=\"1024\" height=\"776\" src=\"https:\/\/polysense.poliba.it\/wp-content\/uploads\/2024\/03\/QEPAS-dual-comb-light-1024x776.jpg\" alt=\"\" class=\"wp-image-3147\" srcset=\"https:\/\/polysense.poliba.it\/wp-content\/uploads\/2024\/03\/QEPAS-dual-comb-light-1024x776.jpg 1024w, https:\/\/polysense.poliba.it\/wp-content\/uploads\/2024\/03\/QEPAS-dual-comb-light-300x227.jpg 300w, https:\/\/polysense.poliba.it\/wp-content\/uploads\/2024\/03\/QEPAS-dual-comb-light-768x582.jpg 768w, https:\/\/polysense.poliba.it\/wp-content\/uploads\/2024\/03\/QEPAS-dual-comb-light.jpg 1480w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>The PolySense team has just published\u00a0 a new article on Light: Science &amp; Applications Journal (IF 19.4) reporting on an innovative technique of quartz-enhanced multiheterodyne resonant photoacoustic spectroscopy (QEMR-PAS), in which the beat frequency response from a dual comb is frequency down-converted into the audio frequency domain. In this way, gas molecules act as an <a href=\"https:\/\/polysense.poliba.it\/index.php\/2024\/03\/22\/new-publication-on-light-science-applications-journal\/\" rel=\"nofollow\"><span class=\"sr-only\">Leggi di pi\u00f9New Publication on Light: Science &#038; Applications Journal<\/span>[&hellip;]<\/a><\/p>\n","protected":false},"author":2,"featured_media":3148,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3149","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-senza-categoria"],"_links":{"self":[{"href":"https:\/\/polysense.poliba.it\/index.php\/wp-json\/wp\/v2\/posts\/3149","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/polysense.poliba.it\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/polysense.poliba.it\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/polysense.poliba.it\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/polysense.poliba.it\/index.php\/wp-json\/wp\/v2\/comments?post=3149"}],"version-history":[{"count":1,"href":"https:\/\/polysense.poliba.it\/index.php\/wp-json\/wp\/v2\/posts\/3149\/revisions"}],"predecessor-version":[{"id":3150,"href":"https:\/\/polysense.poliba.it\/index.php\/wp-json\/wp\/v2\/posts\/3149\/revisions\/3150"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/polysense.poliba.it\/index.php\/wp-json\/wp\/v2\/media\/3148"}],"wp:attachment":[{"href":"https:\/\/polysense.poliba.it\/index.php\/wp-json\/wp\/v2\/media?parent=3149"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/polysense.poliba.it\/index.php\/wp-json\/wp\/v2\/categories?post=3149"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/polysense.poliba.it\/index.php\/wp-json\/wp\/v2\/tags?post=3149"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}