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Lett."],"published-print":{"date-parts":[[2026,10,15]]},"abstract":"<jats:p>\n                    Broadband visible (VIS, 0.4\u20130.78\u2009\u03bcm) and near-infrared (NIR,\n\t\t\t\t\t0.78\u20131.1\u2009\u03bcm) absorbers that avoid metallic and metal-like materials\n\t\t\t\t\tare attractive for integrated photonics, optical sensing, and\n\t\t\t\t\tenergy-related optoelectronics. However, scalable VIS\u2013NIR absorbers\n\t\t\t\t\twithout conventional metallic layers or conducting metal-like\n\t\t\t\t\tmaterials such as indium tin oxide (ITO) remain insufficiently\n\t\t\t\t\tdeveloped. Here, we demonstrate a planar absorber based on\n\t\t\t\t\tsputter-deposited indium antimonide (InSb),\n\t\t\t\t\tAl\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>3<\/jats:sub>\n                    , and SiO\n                    <jats:sub>2<\/jats:sub>\n                    , where VIS\u2013NIR\n\t\t\t\t\tdenotes the full 0.4\u20131.1\u2009\u03bcm operating band. Unlike absorbers that rely\n\t\t\t\t\ton metallic reflectors or conducting metal-like oxide layers, the\n\t\t\t\t\tpresent structure uses dielectric\/semiconductor layers to realize\n\t\t\t\t\tbroadband absorption. The device achieves average absorptance values\n\t\t\t\t\tof 91.47% over VIS\u2013NIR, 86.93% in the VIS band, and 96.85% in the NIR\n\t\t\t\t\tband. This work provides a scalable dielectric\/semiconductor route\n\t\t\t\t\ttoward broadband optical absorbers without metallic or metal-like\n\t\t\t\t\tmaterials.\n                  <\/jats:p>","DOI":"10.1364\/ol.611069","type":"journal-article","created":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T13:41:37Z","timestamp":1791466897000},"page":"5814","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Metallic-layer-free multilayer absorber for visible and near-infrared bands"],"prefix":"10.1364","volume":"51","author":[{"given":"Jiabao","family":"Sun","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/00a2xv884","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rongxuan","family":"Zhu","sequence":"additional","affiliation":[{"name":"Zhejiang University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yijun","family":"Sun","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/00a2xv884","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ke","family":"Chai","sequence":"additional","affiliation":[{"name":"Zhejiang University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xuyang","family":"Wang","sequence":"additional","affiliation":[{"name":"Zhejiang University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3676-0151","authenticated-orcid":true,"given":"Pintu","family":"Ghosh","sequence":"additional","affiliation":[{"name":"Zhejiang University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0004-2137-7752","authenticated-orcid":true,"given":"Huanzheng","family":"Zhu","sequence":"additional","affiliation":[{"name":"Zhejiang University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaoyu","family":"Dong","sequence":"additional","affiliation":[{"name":"Zhejiang Engineering Construction Management Co., Ltd."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhenfang","family":"Yu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuanfang","family":"Lin","sequence":"additional","affiliation":[{"name":"Zhejiang University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9344-6682","authenticated-orcid":true,"given":"Qiang","family":"Li","sequence":"additional","affiliation":[{"name":"Zhejiang University"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2026,10,12]]},"reference":[{"key":"ol-51-20-5814-R1","doi-asserted-by":"publisher","first-page":"A1843","DOI":"10.1364\/OE.22.0A1843","type":"journal-article","volume":"22","author":"Liu","year":"2014","journal-title":"Opt.\n\t\t\t\t\tExpress"},{"key":"ol-51-20-5814-R2","doi-asserted-by":"publisher","first-page":"061108","DOI":"10.1063\/1.4908182","type":"journal-article","volume":"106","author":"Ding","year":"2015","journal-title":"Appl. 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All rights, including\n\t\t\t\t\tfor text and data mining (TDM), Artificial Intelligence (AI) training,\n\t\t\t\t\tand similar technologies, are reserved.","name":"copyright","label":"Copyright"}]}}