{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,6]],"date-time":"2026-02-06T04:31:20Z","timestamp":1770352280539,"version":"3.49.0"},"reference-count":29,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2010,9,8]],"date-time":"2010-09-08T00:00:00Z","timestamp":1283904000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>We have developed novel single-photon detectors in the 10\u201350 \u03bcm wavelength region. The detectors are charge-sensitive infrared phototransistors (CSIPs) fabricated in GaAs\/AlGaAs double quantum well (QW) structures, in which a photo-generated hole (+e) in the floating gate (upper QW) modulates the conductance of a capacitively-coupled channel located underneath (lower QW). The excellent noise equivalent power (NEP = 8.3 \u00d7 10\u221219 W\/Hz1\/2) and specific detectivity (D* = 8 \u00d7 1014 cm Hz1\/2\/W) are demonstrated for 15 micron detection up to 23 K, which are by a few orders of magnitude better than those of other state-of-the-art high-sensitivity detectors. The dynamic range exceeds 106 (~aW to pW) by repeatedly resetting the accumulated holes in the upper QW. Simple device structure makes the detectors feasible for array fabrication: Furthermore, monolithic integration with reading circuits will be possible.<\/jats:p>","DOI":"10.3390\/s100908411","type":"journal-article","created":{"date-parts":[[2010,9,19]],"date-time":"2010-09-19T09:41:46Z","timestamp":1284889306000},"page":"8411-8423","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":18,"title":["Novel Ultra-Sensitive Detectors in the 10\u201350 \u03bcm Wavelength Range"],"prefix":"10.3390","volume":"10","author":[{"given":"Takeji","family":"Ueda","sequence":"first","affiliation":[{"name":"CREST, Japan Science and Technology Agency\/5 Sambancho, Chiyoda-ku, Yokyo, 102-0075, Japan"},{"name":"Department of Basic Science, the University of Tokyo\/3-8-1 Komaba, Meguro-ku, Tokyo, 153-8902, Japan"}]},{"given":"Susumu","family":"Komiyama","sequence":"additional","affiliation":[{"name":"Department of Basic Science, the University of Tokyo\/3-8-1 Komaba, Meguro-ku, Tokyo, 153-8902, Japan"}]}],"member":"1968","published-online":{"date-parts":[[2010,9,8]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"97","DOI":"10.1038\/nphoton.2007.3","article-title":"Cutting-Edge Terahertz Technology","volume":"1","author":"Tonouchi","year":"2007","journal-title":"Nat. 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