{"id":18552,"date":"2015-01-28T12:00:00","date_gmt":"2015-01-28T12:00:00","guid":{"rendered":"https:\/\/dev.inrs.ca\/a-breakthrough-in-terahertz-spectroscopy\/"},"modified":"2020-12-08T09:42:54","modified_gmt":"2020-12-08T14:42:54","slug":"a-breakthrough-in-terahertz-spectroscopy","status":"publish","type":"post","link":"https:\/\/dev.inrs.ca\/en\/news\/a-breakthrough-in-terahertz-spectroscopy\/","title":{"rendered":"A breakthrough in terahertz spectroscopy"},"content":{"rendered":"\n<p><strong>Although terahertz spectroscopy has great potential, especially for environmental monitoring and security screening applications, it previously could not be used effectively to study nanocrystals or molecules at extremely low concentrations. An international team led by Professor&nbsp;<a href=\"https:\/\/dev.inrs.ca\/en\/professeurs\/research\/professors\/luca-razzari\/\">Luca Razzari<\/a>&nbsp;at the&nbsp;<a href=\"https:\/\/dev.inrs.ca\/en\/inrs\/research-centres\/energie-materiaux-telecommunications-research-centre\/\">INRS \u00c9nergie Mat\u00e9riaux T\u00e9l\u00e9communications Research Centre<\/a><a href=\"http:\/\/www.emt.dev.inrs.ca\/\">&nbsp;<\/a>has found a solution to this problem by increasing the technique\u2019s sensitivity using metallic nanostructures, as explained in an&nbsp;<a href=\"http:\/\/pubs.acs.org\/action\/doSearch?text1=razzari&amp;field1=AllField&amp;type=within&amp;publication=40026042\" target=\"_blank\" rel=\"noreferrer noopener\" class=\"broken_link\">article&nbsp;<\/a>published in&nbsp;<a href=\"http:\/\/pubs.acs.org\/journal\/nalefd\" target=\"_blank\" rel=\"noreferrer noopener\" class=\"broken_link\"><em>Nano Letters&nbsp;<\/em><\/a>in January 2015.<\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/dev.inrs.ca\/wp-content\/uploads\/2020\/12\/NEWS_A-breakthrough-in-terahertz-spectroscopy_01.jpg\" alt=\"\" width=\"774\" height=\"466\"\/><\/figure><\/div>\n\n\n\n<p>Terahertz rays (T-rays) have special properties that are very useful in identifying complex molecules and nanomaterials. However, the very long wavelength associated with this kind of radiation significantly hinders its interaction with nano-objects such as nanoparticles, nanorods, and nanotubes, or large molecules of biological interest. To overcome this limitation, the researchers used nanoantennas to reinforce terahertz spectroscopy, building on an existing strategy that has been successfully employed for other applications such as surface-enhanced Raman spectroscopy (SERS).<\/p>\n\n\n\n<p>The researchers demonstrated that it is possible to retrieve the spectroscopic signature of a single layer of semi-conductor nanocrystals and increase their absorption by more than a million times when they are placed in the antennas\u2019 nanocavities. The unique method they developed to squeeze terahertz light into nanovolumes opens up new research perspectives in nanophotonics and broadens the field of applications in both spectroscopy and nonlinear optics.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>About this article<\/strong><\/h2>\n\n\n\n<p><em>These research findings were published in&nbsp;<\/em>Nano Letters<em>(January 2015) under the title&nbsp;<\/em><a href=\"http:\/\/pubs.acs.org\/doi\/full\/10.1021\/nl503705w\" target=\"_blank\" rel=\"noreferrer noopener\" class=\"broken_link\"><em>Squeezing Terahertz Light into Nanovolumes: Nanoantenna Enhanced Terahertz Spectroscopy (NETS) of Semiconductor Quantum Dots<\/em><\/a><em>. Researchers from Quebec, Italy, and Saudi Arabia took part in this project, which was co-funded by the National Science and Engineering Research Council of Canada (NSERC) and Fonds de recherche du Qu\u00e9bec \u2013 Nature et technologies (FRQNT).<\/em><br><a href=\"http:\/\/pubs.acs.org\/doi\/abs\/10.1021\/nl503705w\" target=\"_blank\" rel=\"noreferrer noopener\" class=\"broken_link\"><em>DOI: 10.1021\/nl503705w&nbsp;<\/em><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Although terahertz spectroscopy has great potential, especially for environmental monitoring and security screening applications, it previously could not be used effectively to study nanocrystals or molecules at extremely low concentrations. An international team led by Professor&nbsp;Luca Razzari&nbsp;at the&nbsp;INRS \u00c9nergie Mat\u00e9riaux T\u00e9l\u00e9communications Research Centre&nbsp;has found a solution to this problem by increasing the technique\u2019s sensitivity using [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":37637,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[688],"tags":[],"sectors":[731],"class_list":["post-18552","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-innover-a-linrs-en","sectors-materiaux-en"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.6 (Yoast SEO v24.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>A breakthrough in terahertz spectroscopy | INRS<\/title>\n<meta name=\"description\" content=\"Although terahertz spectroscopy has great potential, especially for 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