https://warwick.ac.uk/fac/sci/physics/research/condensedmatt/ultrafastphotonics/publications/ The latest from Physics » Ultrafast & Terahertz Photonics: Publications (tag [2024]) en-GB (C) 2026 University of Warwick Mon, 30 Mar 2026 08:11:42 GMT http://blogs.law.harvard.edu/tech/rss SiteBuilder2, University of Warwick, http://go.warwick.ac.uk/sitebuilder 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 biomedical highlight Lloyd-Hughes MacPherson Milot nanomaterials perovskites photoluminescence review THz components THz imaging THz spectroscopy ultrafast Untagged https://pubs.acs.org/doi/10.1021/acs.langmuir.4c03103 <p><img src="https://warwick.ac.uk/fac/sci/physics/research/condensedmatt/ultrafastphotonics/publications/Goncalo2024.gif?maxWidth=50" alt="Diagram" style="margin-right: 20px;" border="0" align="right" /></p> <p><strong>G. Costa, </strong> E.M. Brogden, <strong>J.J. Young, H. Ou, A.I. Hernandez-Serrano, R. I. Stantchev,</strong> Stefan A.F. Bon and <strong>E. Pickwell-MacPherson</strong> <br />Langmuir <strong>40</strong>, 25023 (Nov 2024) <button class="abstractButton" onclick="location.href='https://doi.org/10.1021/acs.langmuir.4c03103';">web</button> <button class="abstractButton" onclick="location.href='https://warwick.ac.uk/fac/sci/physics/research/condensedmatt/ultrafastphotonics/publications/Goncalo2024.pdf';">pdf</button> <button class="abstractButton" onclick="showHide('Goncalo2024')">Show abstract</button></p> <div id="Goncalo2024" style="display: none;">The dynamics of the drying process of polymer latexes after casting as a wet film onto a substrate are important to track as they influence the physical and mechanical properties and performance of the dried polymer films. Current methods used to follow this drying process include gravimetric analysis, coupled with advanced techniques like GARField-NMR or optical coherence tomography. The latter two methods provide height and spatial information in the z-direction, normal to the substrate, and occasionally in the xz- or yz-planes. Terahertz time-domain spectroscopy (THz-TDS) is a welcome addition as it provides both the structural and spectroscopic information in the parallel xy-plane, filling the geometric gap. Herein, we utilize THz-TDS to study the drying and film formation process of various polymer latexes with a broad range of glass transition temperatures. We showcase the applicability of this technique in obtaining 2D parallel hydration maps of the drying dispersions, in the form of droplets, using latex-dependent calibration lines. Our findings display known phenomena arising from the drying of the colloidal dispersions.</div> <div class="altmetric-embed" data-badge-popover="right" data-badge-type="2" data-doi="10.1021/acs.langmuir.4c03103" data-hide-no-mentions="true"></div> <div><img src="https://api.elsevier.com/content/abstract/citation-count?doi=10.1021/acs.langmuir.4c03103&amp;httpAccept=image%2Fjpeg&amp;apiKey=23942728d429d8cd622400c4a7485a23" border="0" /></div> THz spectroscopy MacPherson 2024 highlight Wed, 13 Nov 2024 13:45:00 GMT 8ac672c7980c09a70198134e2fe4222e https://ieeexplore.ieee.org/document/10713270 <p><img src="https://warwick.ac.uk/fac/sci/physics/research/condensedmatt/ultrafastphotonics/publications/xavier2024.gif?maxWidth=200" alt="Diagram" style="margin-right: 20px;" border="0" align="right" /></p> <p>X. Romain, P.R. Wilshaw, <strong>R.I. Stantchev, T. Miao, S. Mou </strong> T. Niewelt, S. McNab, S.L. Pain, N.E. Grant, R.S. Bonilla, <strong>E. Pickwell-MacPherson</strong> and J.D. Murphy <br />IEEE Trans. THz Sci. Tech. <strong>15</strong>, 76 (Oct 2024) <button class="abstractButton" onclick="location.href='https://doi.org/10.1364/BOE.513557';">web</button> <button class="abstractButton" onclick="location.href='https://warwick.ac.uk/fac/sci/physics/research/condensedmatt/ultrafastphotonics/publications/Xavier2024.pdf';">pdf</button> <button class="abstractButton" onclick="showHide('Xavier2024')">Show abstract</button></p> <div id="Xavier2024" style="display: none;">Silicon-based terahertz (THz) photomodulators suffer from a modulation speed limited by the lifetime of the charge carriers photoexcited in the silicon. We report a silicon-based THz photomodulator scheme offering real-time reconfiguration of the switching behavior by manipulation of effective charge carrier lifetime. Atomic layer deposition was used to coat silicon samples with dielectric layers to passivate the surfaces with a conductive polymer subsequently deposited to enable electrical gating over the whole surface. The resulting gated photomodulators are characterized using photoconductance decay and photoluminescence imaging. A gated photomodulator with HfO2 passivation is then implemented into a THz time domain spectroscopy setup to demonstrate the potential for live photomodulation optimization during a single-pixel imaging experiment. We use the device to achieve a real-time improvement of the signal-to-noise ratio of the images by a factor of 8.</div> <div class="altmetric-embed" data-badge-popover="right" data-badge-type="2" data-doi="10.1109/TTHZ.2024.3477983" data-hide-no-mentions="true"></div> <div><img src="https://api.elsevier.com/content/abstract/citation-count?doi=10.1109/TTHZ.2024.3477983&amp;httpAccept=image%2Fjpeg&amp;apiKey=23942728d429d8cd622400c4a7485a23" border="0" /></div> THz components MacPherson 2024 Thu, 10 Oct 2024 09:50:00 GMT 8ac672c7980c09a70198136eea392d9d https://opg.optica.org/boe/fulltext.cfm?uri=boe-15-9-5180&id=554566 <div class="news-thumbnail" style="float: left; margin-right: 10px; margin-bottom: 5px;"><img class="thumbnail" width="100" height="100" src="https://warwick.ac.uk/sitebuilder2/file/fac/sci/physics/research/condensedmatt/ultrafastphotonics/publications?sbrPage=%2Ffac%2Fsci%2Fphysics%2Fresearch%2Fcondensedmatt%2Fultrafastphotonics%2Fpublications&newsItem=8ac672c7980c09a701981346b7fe2215" alt="image"></div><p><img src="https://warwick.ac.uk/fac/sci/physics/research/condensedmatt/ultrafastphotonics/publications/xuefei2024.jpg?maxWidth=200" alt="Diagram" style="margin-right: 20px;" border="0" align="right" /></p> <p><strong>X. Ding, A.I. Hernandez-Serrano, J.J. Young and E. Pickwell-MacPherson</strong> <br />Biomedical Optics Express <strong>15</strong>, 5180 (Aug 2024) <button class="abstractButton" onclick="location.href='https://doi.org/10.1364/BOE.527731';">web</button> <button class="abstractButton" onclick="location.href='https://warwick.ac.uk/fac/sci/physics/research/condensedmatt/ultrafastphotonics/publications/Arturo2024b.pdf';">pdf</button> <button class="abstractButton" onclick="showHide('Xuefei2024')">Show abstract</button></p> <div id="Xuefei2024" style="display: none;">The skin, being the body’s largest organ, plays a pivotal role in protecting the body against dangerous external factors. The maintenance of adequate hydration levels is essential for the skin to fulfill this protective function. However, skin hydration depends upon different biophysical factors and lifestyles, such as ethnicity, sex, age, water consumption, and many more. Consequently, methods to assess skin hydration in a precise and non-invasive manner are in high demand. In this paper, using a portable and handheld terahertz (THz) probe, we systematically examine the correlation between diverse biophysical factors and skin hydration profile in a population exceeding 300 participants. Through comparative analysis of THz light reflected from the skin against a dielectric model, we successfully extracted the thickness and hydration percentage of the outermost layer of the epidermis, the stratum corneum (SC). Our findings indicate that SC hydration and thickness are associated with variables such as daily water consumption, age, drinking coffee, and exercise. Additionally, our measurements reveal distinctions in the skin’s hydration properties concerning susceptibility to UV-induced effects by bringing in the Fitzpatrick skin types. This THz-based technique holds the potential for facile integration into clinical settings for the evaluation and diagnosis of various skin-related conditions.</div> <div class="altmetric-embed" data-badge-popover="right" data-badge-type="2" data-doi="10.1364/BOE.527731" data-hide-no-mentions="true"></div> <div><img src="https://api.elsevier.com/content/abstract/citation-count?doi=10.1364/BOE.527731&amp;httpAccept=image%2Fjpeg&amp;apiKey=23942728d429d8cd622400c4a7485a23" border="0" /></div> THz spectroscopy MacPherson 2024 biomedical Tue, 13 Aug 2024 12:45:00 GMT 8ac672c7980c09a701981346b7fe2215 https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.22.024013 <p><img src="https://warwick.ac.uk/fac/sci/physics/research/condensedmatt/ultrafastphotonics/publications/butler-caddle2024.png?maxWidth=300" alt="Charge transport layers" style="margin-right: 10px;" border="0" align="right" /></p> <p><strong>E. Butler-Caddle,</strong> K.D.G.I. Jayawardena, A. Wijesekara, <strong>R.L. Milot</strong> and <strong>J. Lloyd-Hughes</strong> <br />Phys. Rev. Applied <span class="citation_volume"></span><strong>22<span class="cit-volume"></span></strong><span class="cit-issue"> </span><span class="cit-pageRange">024103</span><strong><span class="citation_volume"></span></strong> (Aug 2024) <button class="abstractButton" onclick="location.href='https://doi.org/10.1103/PhysRevApplied.22.024013';">web</button> <button class="abstractButton" onclick="location.href='https://warwick.ac.uk/fac/sci/physics/research/condensedmatt/ultrafastphotonics/publications/butler-caddle2024.pdf';">pdf</button> <button class="abstractButton" onclick="showHide('butler-caddle2024')">Show abstract</button></p> <div id="butler-caddle2024" style="display: none;">In perovskite solar cells, photovoltaic action is created by charge transport layers (CTLs) either side of the light-absorbing metal halide perovskite semiconductor. Hence, the rates for desirable charge extraction and unwanted interfacial recombination at the perovskite-CTL interfaces play a critical role for device efficiency. Here, the electrical properties of perovskite-CTL bilayer heterostructures are obtained using ultrafast terahertz and optical studies of the charge carrier dynamics after pulsed photoexcitation, combined with a physical model of charge carrier transport that includes the prominent Coulombic forces that arise after selective charge extraction into a CTL, and cross-interfacial recombination. The charge extraction velocity at the interface and the ambipolar diffusion coefficient within the perovskite are determined from the experimental decay profiles for heterostructures with three of the highest-performing CTLs, namely C60, PCBM and Spiro-OMeTAD. Definitive targets for the further improvement of devices are deduced: fullerenes deliver fast electron extraction, but suffer from a large rate constant for cross-interface recombination or hole extraction. Conversely, Spiro-OMeTAD exhibits slow hole extraction but does not increase the perovskite’s surface recombination rate, likely contributing to its success in solar cell devices.</div> <div align="left"><img src="https://api.elsevier.com/content/abstract/citation-count?doi=10.1103/PhysRevApplied.22.024013&amp;httpAccept=image%2Fjpeg&amp;apiKey=23942728d429d8cd622400c4a7485a23" border="0" /></div> <div class="altmetric-embed" data-badge-popover="right" data-badge-type="2" data-doi="10.1103/PhysRevApplied.22.024013" data-hide-no-mentions="true"></div> THz spectroscopy photoluminescence Milot 2024 perovskites Lloyd-Hughes ultrafast Tue, 06 Aug 2024 15:12:00 GMT 8a17841a9126f10e0191283fcb962d6c https://pubs.acs.org/doi/10.1021/acs.jpcc.4c03221 <div class="news-thumbnail" style="float: left; margin-right: 10px; margin-bottom: 5px;"><img class="thumbnail" width="100" height="100" src="https://warwick.ac.uk/sitebuilder2/file/fac/sci/physics/research/condensedmatt/ultrafastphotonics/publications?sbrPage=%2Ffac%2Fsci%2Fphysics%2Fresearch%2Fcondensedmatt%2Fultrafastphotonics%2Fpublications&newsItem=8a17841b910d330101912470859000c0" alt="image"></div><p><img src="https://warwick.ac.uk/fac/sci/physics/research/condensedmatt/ultrafastphotonics/publications/Deveikis2024.jpeg?maxWidth=150" alt="ThMAPbI" style="margin-right: 10px;" border="0" align="right" /></p> <p><span class="accordion-tabbed__tab-mobile accordion__closed"><strong>Justas Deveikis</strong>, Marcin Giza, David Walker, Jie Liu, Claire Wilson, <strong>Nathaniel P. Gallop</strong>, Pablo Docampo, <strong>James Lloyd-Hughes</strong> and <strong>Rebecca L. Milot</strong></span><br />J. Phys. Chem. C <span class="citation_volume"><strong>128 </strong></span>13108<span class="cit-issue"></span><span class="cit-issue"><strong><span class="cit-volume"></span></strong><span class="cit-issue">&nbsp;</span></span><span class="cit-pageRange"> </span>(July 2024) <button class="abstractButton" onclick="location.href='https://doi.org/10.1021/acs.jpcc.4c03221';">web</button> <button class="abstractButton" onclick="location.href='deveikis2024.pdf';">pdf</button> <button class="abstractButton" onclick="showHide('Deveikis2024')">Show abstract</button></p> <div id="Deveikis2024" style="display: none;">Improved knowledge of the influence of temperature upon layered perovskites is essential to enable perovskite-based devices to operate over a broad temperature range and to elucidate the impact of structural changes upon the optoelectronic properties. We examined the Ruddlesden&ndash;Popper layered perovskite 2-thiophenemethylammonium lead iodide (ThMA2PbI4) and observed a structural phase transition between a high- and a low-temperature phase at 220&thinsp;K using temperature-dependent X-ray diffraction, UV&ndash;visible absorption, and photoluminescence (PL) spectroscopy. The structural phase transition altered the tilt pattern of the inorganic octahedra layer, modifying the absorption and PL spectra. Further, we found a narrow and intense additional PL peak in the low-temperature phase, which we assigned to radiative emission from a defect-bound exciton state. In both phases we determined the thermal expansion coefficient and found values similar to those of cubic 3D perovskites, i.e., larger than those of typical substrates such as glass. These results demonstrate that the organic spacer plays a critical role in controlling the temperature-dependent structural and optoelectronic properties of layered perovskites and suggests more widely that strain management strategies may be needed to fully utilize layered perovskites in device applications.</div> <div class="altmetric-embed" data-badge-popover="right" data-badge-type="2" data-doi="10.1021/acs.jpcc.4c03221" data-hide-no-mentions="true"></div> photoluminescence Milot 2024 perovskites Lloyd-Hughes highlight Mon, 05 Aug 2024 21:27:00 GMT 8a17841b910d330101912470859000c0 https://www.nature.com/articles/s41598-024-68106-2 <p><img src="https://warwick.ac.uk/fac/sci/physics/research/condensedmatt/ultrafastphotonics/publications/jacob2024.webp?maxWidth=200" alt="Diagram" style="margin-right: 20px;" border="0" align="right" /></p> <p><strong>J.J. Young, A.I. Hernandez-Serrano, </strong> J. Hardwicke and <strong>E. Pickwell-MacPherson</strong> <br />Scientific Reports <strong>14</strong>, 17546 (July 2024) <button class="abstractButton" onclick="location.href='https://doi.org/10.1038/s41598-024-68106-2';">web</button> <button class="abstractButton" onclick="location.href='https://warwick.ac.uk/fac/sci/physics/research/condensedmatt/ultrafastphotonics/publications/Jacob2024.pdf';">pdf</button> <button class="abstractButton" onclick="showHide('Jacob2024')">Show abstract</button></p> <div id="Jacob2024" style="display: none;">In this study we present the first in vivo clinical study of patients with eczema and psoriasis using terahertz (THz) sensing. Eczema and psoriasis patients were measured using a handheld THz scanner, both before and after the application of moisturiser. We show that THz sensing can distinguish between dry and healthy skin in different regions of the body. Furthermore, the impact of applying moisturiser on the skin can also be observed and potentially evaluated using THz light.</div> <div class="altmetric-embed" data-badge-popover="right" data-badge-type="2" data-doi="10.1038/s41598-024-68106-2" data-hide-no-mentions="true"></div> <div><img src="https://api.elsevier.com/content/abstract/citation-count?doi=10.1038/s41598-024-68106-2&amp;httpAccept=image%2Fjpeg&amp;apiKey=23942728d429d8cd622400c4a7485a23" border="0" /></div> THz spectroscopy MacPherson 2024 biomedical Tue, 30 Jul 2024 08:45:00 GMT 8ac672c49809b12801981353240f6677 https://onlinelibrary.wiley.com/doi/10.1002/admi.202400305 <p><img src="https://warwick.ac.uk/fac/sci/physics/research/condensedmatt/ultrafastphotonics/publications/healy2024a.jpg?maxWidth=200" alt="Shaping" style="margin-right: 10px;" border="0" align="right" /></p> <p>BFM Healy, SL Pain, <strong>J. Lloyd-Hughes</strong>, NE Grant and JD Murphy <br />Adv<strong>. </strong>Mater. Interfaces <span class="citation_volume"></span><strong><span class="cit-volume"></span></strong><span class="cit-issue"><strong> 11</strong> </span>2400305 (Jul 2024) <button class="abstractButton" onclick="location.href='https://doi.org/10.1088/2053-1591/ad18ef';">web</button> <button class="abstractButton" onclick="location.href='https://warwick.ac.uk/fac/sci/physics/research/condensedmatt/ultrafastphotonics/publications/healy2024a.pdf';">pdf</button> <button class="abstractButton" onclick="showHide('healy2024a')">Show abstract</button></p> <div id="healy2024a" style="display: none;">Monolayer molybdenum disulfide (1L MoS2), a promising optoelectronic material, emits strong visible photoluminescence (PL). Systematic control of the intensity, energy, and spectral width of PL from 1L MoS2 on silicon dioxide/silicon (SiO2/Si) is demonstrated via simple external treatments. Treating MoS2 with solutions formed from the superacid bis-(trifluoromethanesulfonyl)amide (TFSA) enhances, blueshifts, and sharpens the PL. Treatments with solutions from structurally analogous chemicals that lack sulfur, in the case of bis(trifluoroacetamide) (BTFA), or lack fluorine, in the case of methanesulfonamide (MSA), show the same trend, suggesting a two-component mechanism for TFSA involving the presence of electronegative species and sulfur vacancy passivation. Up to ≈100× enhancement of the PL intensity is achieved, with the peak blueshifted by ≈30 meV and the spectral linewidth halved. Conversely, direct thermal atomic layer deposition (ALD) of aluminum oxide (Al2O3) or hafnium oxide (HfO2) is found to suppress the PL by up to a factor of ≈3, redshift by up to ≈70 meV, and broaden by ≈3×. Single-spot and mapping Raman/PL techniques are combined in a robust characterization process to associate changes in the PL character to charge doping. This work demonstrates the convenient tunability of the optical behavior of 1L MoS2 by varying the electron density.</div> <div align="left"><img src="https://api.elsevier.com/content/abstract/citation-count?doi=10.1002/admi.202400305&amp;httpAccept=image%2Fjpeg&amp;apiKey=23942728d429d8cd622400c4a7485a23" border="0" /></div> <div class="altmetric-embed" data-badge-popover="right" data-badge-type="2" data-doi="10.1002/admi.202400305" data-hide-no-mentions="true"></div> nanomaterials 2024 Lloyd-Hughes Wed, 10 Jul 2024 12:55:00 GMT 8a17841a909c4de001909cb6e3fe1579 https://opg.optica.org/boe/fulltext.cfm?uri=boe-15-5-3064&id=549001 <p><img src="https://warwick.ac.uk/fac/sci/physics/research/condensedmatt/ultrafastphotonics/publications/arturo2024.jpeg?maxWidth=200" alt="Diagram" style="margin-right: 20px;" border="0" align="right" /></p> <p><strong>A.I. Hernandez-Serrano, X. Ding, G. Costa, </strong> G. Nurumbetov, D.M. Haddleton and <strong>E. Pickwell-MacPherson</strong> <br />Biomedical Optics Express <strong>15</strong>, 3064 (May 2024) <button class="abstractButton" onclick="location.href='https://doi.org/10.1364/BOE.513557';">web</button> <button class="abstractButton" onclick="location.href='https://warwick.ac.uk/fac/sci/physics/research/condensedmatt/ultrafastphotonics/publications/Arturo2024b.pdf';">pdf</button> <button class="abstractButton" onclick="showHide('Arturo2024b')">Show abstract</button></p> <div id="Arturo2024b" style="display: none;">Transdermal drug delivery patches are a good alternative to hypodermic drug injection. The drug delivery efficiency depends strongly on the hydration of the skin under treatment, and therefore, it is essential to study the effects on the skin induced by the application of these medical-grade patches. Terahertz (THz) spectroscopy shows great promise for non-invasive skin evaluation due to its high sensitivity to subtle changes in water content, low power and non-ionizing properties. In this work, we study the effects of transdermal drug delivery patches (three fully occlusive and three partially occlusive) applied on the upper arms of ten volunteers for a maximum period of 28&thinsp;h. Three different levels of propylene glycol (0&thinsp;%, 3&thinsp;% and 6&thinsp;%) are added to the patches as excipient. By performing multilayer analysis, we successfully retrieve the water content of the stratum corneum (SC) which is the outermost layer of skin, as well as its thickness at different times before and after applying the patches. This study demonstrates the potential of using THz sensing for non invasive skin monitoring and has wide applications for skin evaluation as well as the development of skin products.</div> <div class="altmetric-embed" data-badge-popover="right" data-badge-type="2" data-doi="10.1364/BOE.513557" data-hide-no-mentions="true"></div> <div><img src="https://api.elsevier.com/content/abstract/citation-count?doi=10.1364/BOE.513557&amp;httpAccept=image%2Fjpeg&amp;apiKey=23942728d429d8cd622400c4a7485a23" border="0" /></div> THz spectroscopy MacPherson 2024 biomedical highlight Wed, 15 May 2024 06:25:00 GMT 8ac672c7928fa5310192adc08b124e6f https://doi.org/10.1117/1.APN.3.1.016012 <p><img src="https://warwick.ac.uk/fac/sci/physics/research/condensedmatt/ultrafastphotonics/publications/arturo2024.png?maxWidth=200" alt="Diagram" style="margin-right: 20px;" border="0" align="right" /></p> <p><strong>A.I. Hernandez-Serrano, X. Ding, J. Young, G. Costa, A. Dogra,</strong> J. Hardwicke and <strong>E. Pickwell-MacPherson</strong> <br />Advanced Photonics Nexus <strong>3</strong>, 016012 (Feb 2024) <button class="abstractButton" onclick="location.href='https://doi.org/10.1117/1.APN.3.1.016012';">web</button> <button class="abstractButton" onclick="location.href='https://warwick.ac.uk/fac/sci/physics/research/condensedmatt/ultrafastphotonics/publications/Arturo2024.pdf';">pdf</button> <button class="abstractButton" onclick="showHide('Arturo2024')">Show abstract</button></p> <div id="Arturo2024" style="display: none;">This study introduces a handheld terahertz (THz) scanner designed to quantitatively evaluate human skin hydration levels and thickness. This device, through the incorporation of force sensors, demonstrates enhanced repeatability and accuracy over traditional fixed THz systems. The scanner was evaluated in the largest THz skin study to date, assessing 314 volunteers, successfully differentiating between individuals with dry skin and hydrated skin using a numerical stratified skin model. The scanner measures and displays skin hydration dynamics within a quarter of a second, indicating its potential for real-time, noninvasive examinations, opening up opportunities for in vivo and ex vivo diagnosis during patient consultations. Furthermore, the portability and ease of use of our scanner enable its widespread application for in vivo and ex vivo diagnosis during patient consultations, potentially allowing in situ biopsy evaluation and elimination of histopathology processing wait times, thereby improving patient outcomes by facilitating simultaneous tumor diagnosis and removal.</div> <div class="altmetric-embed" data-badge-popover="right" data-badge-type="2" data-doi="10.1117/1.APN.3.1.016012" data-hide-no-mentions="true"></div> <div><img src="https://api.elsevier.com/content/abstract/citation-count?doi=10.1117/1.APN.3.1.016012&amp;httpAccept=image%2Fjpeg&amp;apiKey=23942728d429d8cd622400c4a7485a23" border="0" /></div> THz spectroscopy MacPherson 2024 biomedical Fri, 12 Apr 2024 06:02:00 GMT 8a1785d88ec79a0f018ed0e6b97c57bf https://opg.optica.org/oe/fulltext.cfm?uri=oe-32-4-5567 <p><img src="https://warwick.ac.uk/fac/sci/physics/research/condensedmatt/ultrafastphotonics/publications/Huiliang2024.jpeg?maxWidth=200" alt="Diagram" style="margin-right: 20px;" border="0" align="right" /></p> <p><strong>H. Ou, R.I. Stantchev</strong>, X. Chen, T. Blu, M. Semtsiv, W.T. Masselink, <strong>A. Hernandez Serrano, G. Costa, J. Young, N. Chopra, J. Lloyd-Hughes, and E. Pickwell-MacPherson </strong><br />Optics Express <strong>32</strong>, 5567 (Feb 2024) <button class="abstractButton" onclick="location.href='https://doi.org/10.1364/OE.505567';">web</button> <button class="abstractButton" onclick="location.href='https://warwick.ac.uk/fac/sci/physics/research/condensedmatt/ultrafastphotonics/publications/Ou2024.pdf';">pdf</button> <button class="abstractButton" onclick="showHide('Ou2024')">Show abstract</button></p> <div id="Ou2024" style="display: none;">We propose a polarization sensitive terahertz time-domain spectrometer that can record orthogonally polarized terahertz fields simultaneously, using fibre-coupled photoconductive antennas and a scheme that modulated the emitter’s polarization. The s and p channels of the multi-pixel terahertz emitter were modulated at different frequencies, thereby allowing orthogonal waveforms to be demultiplexed from the recorded signal in post-processing. The performance of the multi-pixel emitter used in this multiplexing scheme was comparable to that of a commercial single-polarization H-dipole antenna. The approach allowed two orthogonally polarized terahertz pulses to be recorded with good signal to noise (&gt;1000:1) within half a second. We verified the capability of the spectrometer by characterizing a birefringent crystal and by imaging a polarization-sensitive metamaterial. This work has significant potential to improve the speed of terahertz polarization sensitive applications, such as ellipsometry and imaging.</div> <div class="altmetric-embed" data-badge-popover="right" data-badge-type="2" data-doi="10.1364/OE.505567" data-hide-no-mentions="true"></div> <div><img src="https://api.elsevier.com/content/abstract/citation-count?doi=10.1364/OE.505567&amp;httpAccept=image%2Fjpeg&amp;apiKey=23942728d429d8cd622400c4a7485a23" border="0" /></div> THz spectroscopy THz components MacPherson 2024 Lloyd-Hughes Fri, 02 Feb 2024 16:17:00 GMT 8a17841a8d5a9559018d6a9c68087c19