{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,10]],"date-time":"2026-04-10T03:14:37Z","timestamp":1775790877548,"version":"3.50.1"},"reference-count":25,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2024,2,26]],"date-time":"2024-02-26T00:00:00Z","timestamp":1708905600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Key Technologies Research","award":["YPML-2022050220"],"award-info":[{"award-number":["YPML-2022050220"]}]},{"name":"Yunnan Precious Metals Laboratory","award":["YPML-2022050220"],"award-info":[{"award-number":["YPML-2022050220"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>PIN InGaAs short wavelength infrared (SWIR) focal plane array (FPA) detectors have attracted extensive attention due to their high detectivity, high quantum efficiency, room temperature operation, low dark current, and good radiation resistance. Furthermore, InGaAs FPA detectors have wide applications in many fields, such as aviation safety, biomedicine, camouflage recognition, and infrared night vision. Recently, extensive research has been conducted on the extension of the response spectrum from short wavelength infrared (SWIR) to visible light (VIS) through InP substrate removal and reserving the n-InP contact layer. However, there is little research on the absorption of InGaAs detectors in the ultraviolet (UV) band. In this paper, we present an ultra-broadband UV\u2013VIS\u2013SWIR 640 \u00d7 512 15 \u03bcm InGaAs FPA detector by removing the n-InP contact layer in the active area and reserving the InP contact layer around the pixels for n contact, creating incident light to be directly absorbed by the In0.53Ga0.47As absorption layer. In addition, the optical absorption characteristics of InGaAs infrared detectors with and without an n-InP contact layer are studied theoretically. The test results show that the spectral response is extended to the range of 200\u20131700 nm. The quantum efficiency is higher than 45% over a broad wavelength range of 300\u20131650 nm. The operability is up to 99.98%, and the responsivity non-uniformity is 3.28%. The imaging capability of InGaAs FPAs without the n-InP contact layer has also been demonstrated, which proves the feasibility of simultaneous detection for these three bands.<\/jats:p>","DOI":"10.3390\/s24051521","type":"journal-article","created":{"date-parts":[[2024,2,26]],"date-time":"2024-02-26T11:31:21Z","timestamp":1708947081000},"page":"1521","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Ultra-Broadband Ultraviolet\u2013Visible Light\u2013Short Wavelength Infrared InGaAs Focal Plane Arrays via n-InP Contact Layer Removal"],"prefix":"10.3390","volume":"24","author":[{"given":"Jiaxin","family":"Zhang","sequence":"first","affiliation":[{"name":"School of Physics and Astronomy, Yunnan University, Kunming 650504, China"},{"name":"Shanxi Guohui Optoelectronic Technology Co., Ltd., Taiyuan 030006, China"}]},{"given":"Wei","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Physics and Astronomy, Yunnan University, Kunming 650504, China"}]},{"given":"Haifeng","family":"Ye","sequence":"additional","affiliation":[{"name":"School of Physics and Astronomy, Yunnan University, Kunming 650504, China"}]},{"given":"Runyu","family":"Huang","sequence":"additional","affiliation":[{"name":"School of Physics and Astronomy, Yunnan University, Kunming 650504, China"}]},{"given":"Chen","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Physics and Astronomy, Yunnan University, Kunming 650504, China"}]},{"given":"Weilin","family":"Zhao","sequence":"additional","affiliation":[{"name":"School of Physics and Astronomy, Yunnan University, Kunming 650504, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9165-0997","authenticated-orcid":false,"given":"Yanli","family":"Shi","sequence":"additional","affiliation":[{"name":"School of Physics and Astronomy, Yunnan University, Kunming 650504, China"}]}],"member":"1968","published-online":{"date-parts":[[2024,2,26]]},"reference":[{"key":"ref_1","first-page":"39","article-title":"New developments on InGaAs focal plane array","volume":"9070","author":"Coussement","year":"2014","journal-title":"Proc. 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