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Here, this aspect of sensing was employed in the terahertz (THz) range for mapping liquid water in the plucked leaves of Bambusa vulgaris and Celtis sinensis. Two complementary techniques, broadband THz time-domain spectroscopic imaging and THz quantum cascade laser-based imaging, were utilized. The resulting hydration maps capture the spatial variations within the leaves as well as the hydration dynamics in various time scales. Although both techniques employed raster scanning to acquire the THz image, the results provide very distinct and different information. Terahertz time-domain spectroscopy provides rich spectral and phase information detailing the dehydration effects on the leaf structure, while THz quantum cascade laser-based laser feedback interferometry gives insight into the fast dynamic variation in dehydration patterns.<\/jats:p>","DOI":"10.3390\/s23052721","type":"journal-article","created":{"date-parts":[[2023,3,2]],"date-time":"2023-03-02T02:10:59Z","timestamp":1677723059000},"page":"2721","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Comparison of Physical and System Factors Impacting Hydration Sensing in Leaves Using Terahertz Time-Domain and Quantum Cascade Laser Feedback Interferometry Imaging"],"prefix":"10.3390","volume":"23","author":[{"given":"Khushboo","family":"Singh","sequence":"first","affiliation":[{"name":"Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1661-1266","authenticated-orcid":false,"given":"Aparajita","family":"Bandyopadhyay","sequence":"additional","affiliation":[{"name":"DRDO-Industry-Academia Center of Excellence, Indian Institute of Technology Delhi, New Delhi 110016, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1087-2315","authenticated-orcid":false,"given":"Karl","family":"Bertling","sequence":"additional","affiliation":[{"name":"School of Information Technology & Electrical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3484-045X","authenticated-orcid":false,"given":"Yah Leng","family":"Lim","sequence":"additional","affiliation":[{"name":"School of Information Technology & Electrical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tim","family":"Gillespie","sequence":"additional","affiliation":[{"name":"School of Information Technology & Electrical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9121-9846","authenticated-orcid":false,"given":"Dragan","family":"Indjin","sequence":"additional","affiliation":[{"name":"School of Electronic and Electrical Engineering, University of Leeds, Leeds LS2 9JT, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4998-7259","authenticated-orcid":false,"given":"Lianhe","family":"Li","sequence":"additional","affiliation":[{"name":"School of Electronic and Electrical Engineering, University of Leeds, Leeds LS2 9JT, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6912-0535","authenticated-orcid":false,"given":"Edmund H.","family":"Linfield","sequence":"additional","affiliation":[{"name":"School of Electronic and Electrical Engineering, University of Leeds, Leeds LS2 9JT, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1987-4846","authenticated-orcid":false,"given":"A. 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The State of Food and Agriculture (SOFA), FOA. Technical Report."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Calicioglu, O., Flammini, A., Bracco, S., Bellu, L., and Sims, R. (2019). The future challenges of food and agriculture: An integrated analysis of trends and solutions. Sustainability, 11.","DOI":"10.3390\/su11010222"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"100347","DOI":"10.1016\/j.gfs.2019.100347","article-title":"Dealing with the game-changing technologies of Agriculture 4.0: How do we manage diversity and responsibility in food system transition pathways?","volume":"24","author":"Klerkx","year":"2020","journal-title":"Glob. Food Secur."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"87","DOI":"10.3389\/fsufs.2018.00087","article-title":"Agriculture 4.0: Broadening Responsible Innovation in an Era of Smart Farming","volume":"2","author":"Rose","year":"2018","journal-title":"Front. Sustain. Food Syst"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"40","DOI":"10.1364\/OPN.30.11.000040","article-title":"Advanced Spectroscopy in Precision Agriculture","volume":"30","author":"Ariunbold","year":"2019","journal-title":"Opt. Photonics News"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"119","DOI":"10.1093\/jxb\/erl118","article-title":"Monitoring plant and soil water status: Established and novel methods revisited and their relevance to studies of drought tolerance","volume":"58","author":"Jones","year":"2007","journal-title":"J. Exp. Bot."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"267","DOI":"10.1016\/j.compag.2017.07.026","article-title":"Recent advances in crop water stress detection","volume":"141","author":"Ihuoma","year":"2017","journal-title":"Comput. Electron. Agric."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"2025","DOI":"10.3390\/molecules24102025","article-title":"Applications of Photonics in Agriculture Sector: A Review","volume":"24","author":"Yeong","year":"2019","journal-title":"Molecules"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"1716","DOI":"10.1364\/OL.20.001716","article-title":"Imaging with terahertz waves","volume":"20","author":"Hu","year":"1995","journal-title":"Opt. Lett."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"97","DOI":"10.1007\/s10762-011-9865-7","article-title":"Review of moisture and liquid detection and mapping using terahertz imaging","volume":"33","author":"Federici","year":"2012","journal-title":"J. Infrared Millim Terahertz Waves"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"520","DOI":"10.1109\/TTHZ.2018.2851922","article-title":"Temporal and Spatial Variability of Water Status in Plant Leaves by Terahertz Imaging","volume":"8","author":"Song","year":"2018","journal-title":"IEEE Trans. THz Sci. Technol."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"105628","DOI":"10.1016\/j.compag.2020.105628","article-title":"Terahertz spectroscopy and imaging: A review on agricultural applications","volume":"177","author":"Akbari","year":"2020","journal-title":"Comp. Electron. Agric."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"106515","DOI":"10.1016\/j.compag.2021.106515","article-title":"Terahertz spectroscopy for quantification of free water and bound water in leaf","volume":"191","author":"Zang","year":"2021","journal-title":"Comput. Electron. Agric."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"106","DOI":"10.1186\/s13007-019-0492-y","article-title":"Terahertz spectral imaging based quantitative determination of spatial distribution of plant leaf constituents","volume":"15","author":"Zang","year":"2019","journal-title":"Plant Methods"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"2266","DOI":"10.1364\/BOE.9.002266","article-title":"Terahertz time-domain spectroscopy for non-invasive assessment of water content in biological samples","volume":"9","author":"Borovkova","year":"2018","journal-title":"Biomed. Opt. Express"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"138","DOI":"10.1186\/s13007-019-0522-9","article-title":"Machine learning driven non-invasive approach of water content estimation in living plant leaves using terahertz waves","volume":"15","author":"Zahid","year":"2019","journal-title":"Plant Methods"},{"key":"ref_17","first-page":"36101","article-title":"Permittivity of pure water, at standard atmospheric pressure, over a frequency range of 0\u201325 THz and the temperature range of 0\u2013100 \u00b0C","volume":"36","author":"Ellison","year":"2006","journal-title":"J. Phys. Chem. Ref. Data"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"036101","DOI":"10.1063\/1.2151267","article-title":"Absorption spectra of liquid water and aqueous buffers between 0.3\u20133.2 THz","volume":"112","author":"Xu","year":"2006","journal-title":"J. Chem. Phys."},{"key":"ref_19","first-page":"170","article-title":"Leaf Anatomy in Grass Systematic","volume":"119","author":"Brown","year":"1958","journal-title":"Int. J. Plant Sci"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"47006","DOI":"10.1117\/1.3570648","article-title":"Development of a compact terahertz time-domain spectrometer for the measurement of the optical properties of biological tissues","volume":"16","author":"Wilmink","year":"2011","journal-title":"J. Biomed. Opt."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"943","DOI":"10.1007\/s10762-018-0520-4","article-title":"Outdoor Measurements of Leaf Water Content Using THz Quasi Time-Domain Spectroscopy","volume":"39","author":"Gente","year":"2018","journal-title":"J. Infrared Milli. Terahertz Waves"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"471","DOI":"10.1080\/02564602.2020.1865844","article-title":"A Review of the Concept, Applications and Implementation Issues of Terahertz Spectral Imaging Technique","volume":"39","author":"Bandyopadhyay","year":"2021","journal-title":"IETE Tech. Rev"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"433001","DOI":"10.1088\/1361-6463\/ab31d5","article-title":"A review of terahertz detectors","volume":"52","author":"Lewis","year":"2019","journal-title":"J. Phys. D Appl. Phys."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"021320","DOI":"10.1063\/1.5094674","article-title":"Sensing and imaging using laser feedback interferometry with quantum cascade lasers","volume":"6","author":"Taimre","year":"2019","journal-title":"Appl. Phys. Rev."},{"key":"ref_25","doi-asserted-by":"crossref","unstructured":"Singh, K., Bandyopadhyay, A., Bertling, K., Lim, Y.L., Gillespie, T., Robinson, A., Indjin, D., Han, Y., Li, L., and Linfield, E.H. (2020, January 2\u20136). Monitoring water dynamics in plants using laser feedback interferometry. Proceedings of the CLEO-PR, Sydney, NSW, Australia.","DOI":"10.1364\/CLEOPR.2020.C12B_4"},{"key":"ref_26","first-page":"121340F","article-title":"Rapid genetic discrimination in plants through terahertz spectroscopy","volume":"Volume 12134","author":"Jarrahi","year":"2022","journal-title":"Proceedings of the Terahertz Photonics II, Strasbourg, France, 31 May 2022"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"564","DOI":"10.1016\/j.molliq.2017.10.071","article-title":"Possible mechanism of molecular motion in liquid water from dielectric spectroscopy data","volume":"248","author":"Volkov","year":"2017","journal-title":"J. Mol. Liq."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"166","DOI":"10.1016\/j.cplett.2008.09.015","article-title":"Origin of the fast relaxation component of water and heavy water revealed by terahertz time-domain attenuated total reflection spectroscopy","volume":"464","author":"Yada","year":"2007","journal-title":"Chem. Phys. Lett."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"1563","DOI":"10.1111\/1541-4337.12490","article-title":"A Comprehensive Review on Food Applications of Terahertz Spectroscopy and Imaging","volume":"18","author":"Hajeb","year":"2019","journal-title":"Compr. Rev. Food Sci. Food Saf."},{"key":"ref_30","doi-asserted-by":"crossref","unstructured":"Mittleman, D. (2003). Terahertz Imaging in Sensing with Terahertz Radiation, Springer.","DOI":"10.1007\/978-3-540-45601-8"},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"1404","DOI":"10.1038\/s41598-020-58277-z","article-title":"Three-dimensional water mapping of succulent Agave victoriaereginae leaves by terahertz imaging","volume":"10","author":"Singh","year":"2020","journal-title":"Sci. Rep."},{"key":"ref_32","unstructured":"Mangena, P. (2018). Plant, Abiotic Stress and Responses to Climate Change, Intechopen. Chapter 2."},{"key":"ref_33","first-page":"11685","article-title":"Extraction of optical parameters of composite materials for real-world THz application","volume":"11685","author":"Singh","year":"2021","journal-title":"Proc. SPIE"},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"3314","DOI":"10.1364\/OL.44.003314","article-title":"Detection sensitivity of laser feedback interferometry using a terahertz quantum cascade laser","volume":"44","author":"Keeley","year":"2019","journal-title":"Opt. Lett."},{"key":"ref_35","doi-asserted-by":"crossref","unstructured":"Bertling, K., Qi, X., Taimre, T., Lim, Y.L., and Rakic, A.D. (2022). Feedback Regimes of LFI Sensors: Experimental Investigations. Sensor, 22.","DOI":"10.3390\/s22229001"},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"22194","DOI":"10.1364\/OE.21.022194","article-title":"Swept-frequency feedback interferometry using terahertz frequency QCLs: A method for imaging and materials analysis","volume":"21","author":"Taimre","year":"2013","journal-title":"Opt. Express"},{"key":"ref_37","doi-asserted-by":"crossref","unstructured":"Han, S., Bertling, K., Dean, P., Keeley, J., Burnett, A.D., Lim, Y.L., Khanna, S.P., Valavanis, A., Linfield, E.H., and Davies, A.G. (2016). Laser Feedback Interferometry as a Tool for Analysis of Granular Materials at Terahertz Frequencies: Towards Imaging and Identification of Plastic Explosives. Sensors, 16.","DOI":"10.3390\/s16030352"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"18633","DOI":"10.1364\/OE.22.018633","article-title":"Methodology for Materials Analysis using Swept-Frequency Feedback Interferometry with Terahertz Frequency Quantum Cascade Lasers","volume":"22","author":"Taimre","year":"2014","journal-title":"Opt. Express"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1109\/LSENS.2018.2858927","article-title":"Determining ethanol content of liquid solutions using laser feedback interferometry with a terahertz quantum cascade laser","volume":"2","author":"Bertling","year":"2018","journal-title":"IEEE Sens. Lett."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"7236","DOI":"10.1038\/s41598-017-07432-0","article-title":"Measurement of the emission spectrum of a semiconductor laser using laser-feedback interferometry","volume":"7","author":"Keeley","year":"2017","journal-title":"Sci. Rep."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1109\/JQE.2018.2806948","article-title":"Frequency Tuning Range Control in Pulsed Terahertz Quantum-Cascade Lasers: Applications in Interferometry","volume":"54","author":"Agnew","year":"2018","journal-title":"IEEE J. Quantum Electron."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"1937","DOI":"10.1109\/JSEN.2015.2507184","article-title":"Simple electrical modulation scheme for laser feedback imaging","volume":"16","author":"Bertling","year":"2016","journal-title":"IEEE J. Sens."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"10221","DOI":"10.1364\/OE.27.010221","article-title":"Coherent imaging using laser feedback interferometry with pulsed-mode terahertz quantum cascade lasers","volume":"27","author":"Lim","year":"2019","journal-title":"Opt. Express"},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"011107","DOI":"10.1063\/1.4926602","article-title":"Fast terahertz imaging using a quantum cascade amplifier","volume":"107","author":"Ren","year":"2015","journal-title":"Appl. Phys. Lett."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"011102","DOI":"10.1063\/1.4955405","article-title":"Real-time terahertz imaging through self-mixing in a quantum-cascade laser","volume":"109","author":"Wienold","year":"2016","journal-title":"Appl. Phys. Lett."},{"key":"ref_46","first-page":"1182704","article-title":"Quantifying relative moisture content in dielectric models using CW-THz spectroscopy and supervised machine learning regression","volume":"11827","author":"Kashyap","year":"2021","journal-title":"Proc. SPIE"},{"key":"ref_47","first-page":"121390J","article-title":"Study of moisture content in leaves through regression analysis of terahertz images","volume":"Volume 12139","author":"Berghmans","year":"2022","journal-title":"Proceedings of the Optical Sensing and Detection VII, Strasbourg, France, 17 May 2022"},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"16","DOI":"10.1038\/s41566-020-00707-5","article-title":"High-power portable terahertz laser systems","volume":"15","author":"Khalatpour","year":"2021","journal-title":"Nat. Photonics"},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"091301","DOI":"10.1063\/5.0056487","article-title":"Terahertz imaging with self-pulsations in quantum cascade lasers under optical feedback","volume":"6","author":"Qi","year":"2021","journal-title":"APL Photonics"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/23\/5\/2721\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T18:45:46Z","timestamp":1760121946000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/23\/5\/2721"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,3,2]]},"references-count":49,"journal-issue":{"issue":"5","published-online":{"date-parts":[[2023,3]]}},"alternative-id":["s23052721"],"URL":"https:\/\/doi.org\/10.3390\/s23052721","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,3,2]]}}}