{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,4]],"date-time":"2026-04-04T18:06:09Z","timestamp":1775325969334,"version":"3.50.1"},"reference-count":57,"publisher":"MDPI AG","issue":"15","license":[{"start":{"date-parts":[[2020,7,22]],"date-time":"2020-07-22T00:00:00Z","timestamp":1595376000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100010661","name":"Horizon 2020","doi-asserted-by":"publisher","award":["67568"],"award-info":[{"award-number":["67568"]}],"id":[{"id":"10.13039\/100010661","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000844","name":"European Space Agency","doi-asserted-by":"publisher","award":["THzFET"],"award-info":[{"award-number":["THzFET"]}],"id":[{"id":"10.13039\/501100000844","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001870","name":"Fundacja na rzecz Nauki Polskiej","doi-asserted-by":"publisher","award":["MAB\/2018\/9"],"award-info":[{"award-number":["MAB\/2018\/9"]}],"id":[{"id":"10.13039\/501100001870","id-type":"DOI","asserted-by":"publisher"}]},{"name":"the Lithuanian Agency for Science, Innovation and Technology (MITA)","award":["TPP-03-045"],"award-info":[{"award-number":["TPP-03-045"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This work presents, to our knowledge, the first completely passive imaging with human-body-emitted radiation in the lower THz frequency range using a broadband uncooled detector. The sensor consists of a Si CMOS field-effect transistor with an integrated log-spiral THz antenna. This THz sensor was measured to exhibit a rather flat responsivity over the 0.1\u20131.5-THz frequency range, with values of the optical responsivity and noise-equivalent power of around 40 mA\/W and 42 pW\/    Hz    , respectively. These values are in good agreement with simulations which suggest an even broader flat responsivity range exceeding 2.0 THz. The successful imaging demonstrates the impressive thermal sensitivity which can be achieved with such a sensor. Recording of a 2.3 \u00d7 7.5-cm     2    -sized image of the fingers of a hand with a pixel size of 1 mm     2     at a scanning speed of 1 mm\/s leads to a signal-to-noise ratio of 2 and a noise-equivalent temperature difference of 4.4 K. This approach shows a new sensing approach with field-effect transistors as THz detectors which are usually used for active THz detection.<\/jats:p>","DOI":"10.3390\/s20154087","type":"journal-article","created":{"date-parts":[[2020,7,23]],"date-time":"2020-07-23T11:26:01Z","timestamp":1595503561000},"page":"4087","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":38,"title":["Passive Detection and Imaging of Human Body Radiation Using an Uncooled Field-Effect Transistor-Based THz Detector"],"prefix":"10.3390","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1949-6312","authenticated-orcid":false,"given":"Dovil\u0117","family":"\u010cibirait\u0117-Lukenskien\u0117","sequence":"first","affiliation":[{"name":"Physikalisches Institut, J. W. Goethe University Frankfurt, 60438 Frankfurt, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2165-3866","authenticated-orcid":false,"given":"K\u0119stutis","family":"Ikamas","sequence":"additional","affiliation":[{"name":"Institute of Applied Electrodynamics and Telecommunications, Vilnius University, 10257 Vilnius, Lithuania"},{"name":"The General Jonas \u017demaitis Military Academy of Lithuania, 10322 Vilnius, Lithuania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9954-0469","authenticated-orcid":false,"given":"Tautvydas","family":"Lisauskas","sequence":"additional","affiliation":[{"name":"MB \u201cTerahertz Technologies\u201d, 01116 Vilnius, Lithuania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2387-1947","authenticated-orcid":false,"given":"Viktor","family":"Krozer","sequence":"additional","affiliation":[{"name":"Physikalisches Institut, J. W. Goethe University Frankfurt, 60438 Frankfurt, Germany"},{"name":"Ferdinand-Braun-Institut, Leibniz-Institut f\u00fcr H\u00f6chstfrequenztechnik (FBH), 12489 Berlin, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3980-0964","authenticated-orcid":false,"given":"Hartmut G.","family":"Roskos","sequence":"additional","affiliation":[{"name":"Physikalisches Institut, J. W. Goethe University Frankfurt, 60438 Frankfurt, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1610-4221","authenticated-orcid":false,"given":"Alvydas","family":"Lisauskas","sequence":"additional","affiliation":[{"name":"Physikalisches Institut, J. W. Goethe University Frankfurt, 60438 Frankfurt, Germany"},{"name":"Institute of Applied Electrodynamics and Telecommunications, Vilnius University, 10257 Vilnius, Lithuania"},{"name":"CENTERA Laboratories, Institute of High Pressure Physics PAS, 01-142 Warsaw, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2020,7,22]]},"reference":[{"key":"ref_1","first-page":"523","article-title":"Uncooled Terahertz real-time imaging 2D arrays developed at LETI: Present status and perspectives","volume":"Volume 10194","author":"Simoens","year":"2017","journal-title":"Micro- and Nanotechnology Sensors, Systems, and Applications IX"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"8439","DOI":"10.1038\/ncomms9439","article-title":"High-performing nonlinear visualization of terahertz radiation on a silicon charge-coupled device","volume":"6","author":"Shalaby","year":"2015","journal-title":"Nat. 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