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All-semiconductor plasmonic metamaterials for mid-infrared perfect absorption and selective thermal emission
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <!-- Meta Tags --> <meta http-equiv="content-type" content="application/xhtml+xml; charset=utf-8" /> <meta http-equiv="content-language" content="en-ie" /> <meta name="robots" content="index, follow" /> <meta name="description" content="" /> <meta name="keywords" content="" /> <meta name="author" content="Starlight Solutions" /> <!-- Favicon --> <link rel="shortcut icon" href="http://programme.exordo.com/nanop2018/favicon.ico" /> <!-- CSS --> <link rel="stylesheet" type="text/css" href="/nanop2018/css/layout.css" /><link rel="stylesheet" type="text/css" href="/nanop2018/packages/starolas/css/dashboard.css" /><link rel="stylesheet" type="text/css" href="/nanop2018/css/style.css" /> <script type="text/javascript" src="/nanop2018/packages/basics/js/generic.js"></script><script type="text/javascript" src="/nanop2018/packages/starolas/js/jquery.js"></script><script type="text/javascript" src="/nanop2018/packages/basics/js/json2.js"></script> <title>All-semiconductor plasmonic metamaterials for mid-infrared perfect absorption and selective thermal emission</title> </head> <body> <div id="page"> <div id="page_header"> <div id="page_header_banner"> <div class="dates"> <div class="year"> 2018, </div> <div class="days"> 1st - 3rd October </div> </div> <div class="name"> <a href="http://premc.org/conferences/nanop-nanophotonics-micro-nano-optics/" onclick="window.open(this.href,'_blank');return false;">Nanophotonics and Micro/Nano Optics International Conference 2018</a> </div> <div class="description"> <div class="dots"> <a href="http://www.exordo.com" onclick="window.open(this.href,'_blank');return false;"><img src="/nanop2018/img/template/exordo_dots.png" height="22" width="61" alt="Ex Ordo Dots" /></a> </div> <div class="text"> <a href="/nanop2018/dashboard/programme/" >Conference Programme</a> </div> <div class="status"> </div> </div> </div> </div> <div id="page_content"> <div id="page_content_main_container"> <div class="page_content_main"> <script type="text/javascript"> /* <![CDATA[ */ // Show the long version of the abstract function showAbstract(id) { document.getElementById('abstract_short_' + id).style.display = "none"; document.getElementById('abstract_long_' + id).style.display = "block"; return false; } /* ]]> */ </script> <style> h1 { font-size: 18pt; line-height: 32px; margin: 20px 0px 10px; } </style> <div class="delegate__presentation"> <h1>All-semiconductor plasmonic metamaterials for mid-infrared perfect absorption and selective thermal emission</h1> <div class="presenter_and_bio"> <h2>Franziska Barho</h2> <p> <em>IES, University of Montpellier, CNRS</em> </p> <p> After a master's degree from University of Giessen, Germany, Franziska Barho did her PhD studies at University of Montpellier, France. She worked on plasmonics exclusively based on semiconductor materials for biochemical sensing applications. Currently, she pursues these studies, with a focus on metamaterials based on semiconductor materials, during a one-year post doc position at the Institut d'Electronique et des Systèmes, University of Montpellier. </p> </div> <h2>Abstract</h2> <div id="abstract_short_1"> <p> IntroductionSince the advent of metamaterial science, resonant perfect absorbers (PA) with sub-wavelength thickness have been of interest for electromagnetic wave control in various spectral ranges [1]. Perfect absorbers are... [ <a href="/nanop2018/" onclick="return showAbstract('1');">view full abstract</a> ] </p> </div> <div id="abstract_long_1" style="display:none;"> <p> <p><sub></sub>Introduction</p><p>Since the advent of metamaterial science, resonant perfect absorbers (PA) with sub-wavelength thickness have been of interest for electromagnetic wave control in various spectral ranges [1]. Perfect absorbers are based on suppressed transmission due to a metallic ground plane and simultaneous suppression of the reflected beam, by impedance matching to free space owing to effective material parameters [2]. In this work, we present PA metamaterials using a layer system of dielectric and highly doped semiconductor (HDSC) materials. Plasmonic and cavity resonances can be excited in this layer system when the topmost layer is patterned with nanoantennas. The strong absorptivity is equal to good thermal emission properties, making the perfect absorbers ideal candidates for narrowband selective thermal sources. </p><p> </p><p>Methods</p><p>InAsSb:Si/GaSb/InAsSb:Si layer structures were grown lattice-matched by solid-source molecular beam epitaxy. The topmost layer was patterned using UV or laser interference lithography followed by reactive ion etching (ICP-RIE) and wet chemical etching to obtain a sharp interface between the HDSC and the dielectric spacer. The PA samples were characterized by FTIR spectroscopy in reflectance and transmission mode. The experimental results were corroborated by electromagnetic simulations using the rigorous coupled wave analysis (RCWA). Furthermore, the thermal emission of the PA samples was measured.</p><p> Results and discussion</p><p>We evaluate the thickness of the spacer layer as one of the key parameters to determine the interaction of the plasmonic and cavity resonances supported by the structure. Structures with different spacer thicknesses were optically characterized before and after fabrication of the nanoantennas. For an adapted spacer thickness, reflectivity as low as 0.5% is achieved. In addition, PA structures were tested as highly sensitive surface enhanced infrared absorption (SEIRA) spectroscopy substrates, using 20 nm thin films of polymethyl-methacrylate (PMMA) as test analyte. Finally, we show that the emissivity deduced from the thermal emission spectra of the samples is in agreement with Kirchhoff’s law compared to the samples’ reflectivity. Based on these results, we propose a novel surface enhanced sensing technique using the thermal emission of the near-perfect absorbers.</p><p>References</p><p>[1] Watts <em>et al.</em> Adv. Mater. 2012, 24, OP98-OP120.</p><p>[2] Landy <em>et al.</em> PRL 2008, 100, 207402. </p> </p> </div> <h2>Authors</h2> <ol> <li> <u>Franziska Barho</u> (IES, University of Montpellier, CNRS) </li> <li> Fernando Gonzalez-Posada Flores (IES, University of Montpellier, CNRS) </li> <li> Laurent Cerutti (IES, University of Montpellier, CNRS) </li> <li> Thierry Taliercio (IES, University of Montpellier, CNRS) </li> </ol> <h2>Topic Areas</h2> <p> Photonic & plasmonic nanomaterials , Metamaterials , Enhanced spectroscopy and sensing </p> <h2>Session</h2> <p> OS1b-A » <a href="/nanop2018/delegates/session/11/" >Metamaterials</a> (17:05 - Monday, 1st October, AUDITORIUM) </p> <div class="presentation_files"> <h2>Presentation Files</h2> <p>The presenter has not uploaded any presentation files. </p> </div> </div> </div> </div> <div id="page_content_side_container"> <div class="page_content_side"> <div class="menu"> </div> </div> </div> <div class="clear"> </div> </div> <div id="page_footer"> <div id="page_footer_container"> <div class="links"> <a href="mailto:support@exordo.com" >Email Support</a> • <a href="https://www.exordo.com/blog/" onclick="window.open(this.href,'_blank');return false;">Blog</a> • <a href="https://www.exordo.com/legal/data-protection-and-privacy-policy" onclick="window.open(this.href,'_blank');return false;">Privacy Policy</a> • <a href="/nanop2018/cancellation-policy" >Cancellation Policy</a> </div> <div class="powered_by"> <div class="pb"> powered by </div> <div class="exordo"> <a href="http://www.exordo.com" onclick="window.open(this.href,'_blank');return false;"><img src="/nanop2018/img/template/exordo_logo.png" height="24" width="121" alt="Ex Ordo" /></a> </div> </div> </div> </div> </div> <div class="url" style="display: none; text-indent: -999em;">http://programme.exordo.com/nanop2018/system/is_sync/</div> <script type="text/javascript" src="/nanop2018/packages/starolas/js/is_syncing.js"></script> </body> </html>