{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,15]],"date-time":"2026-09-15T11:02:53Z","timestamp":1789470173624,"version":"build-2803163510"},"reference-count":60,"publisher":"Wiley","issue":"49","license":[{"start":{"date-parts":[[2026,7,22]],"date-time":"2026-07-22T00:00:00Z","timestamp":1784678400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"},{"start":{"date-parts":[[2026,7,22]],"date-time":"2026-07-22T00:00:00Z","timestamp":1784678400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["advanced.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Advanced Materials"],"published-print":{"date-parts":[[2026,9]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Modern nanophotonics demands light manipulation at a subwavelength scale, a capability historically constrained by the isotropic dielectric response of conventional optical semiconductors. Here, we establish \u03b1\u2010MoO\n                    <jats:sub>3<\/jats:sub>\n                    as a high\u2010index, low\u2010loss anisotropic material that bridges the gap between mid\u2010infrared polaritonics and short\u2010wavelength nanophotonics. Integrating spectroscopic ellipsometry, first\u2010principles calculations, and near\u2010field optical microscopy, we determine its broadband 250\u20131700\u00a0nm anisotropic optical constants and combine them with a phonon model in mid\u2010infrared to 30\u00a0\u00b5m. While the mid\u2010infrared phonon polariton properties of \u03b1\u2010MoO\n                    <jats:sub>3<\/jats:sub>\n                    are well established in the literature, the present work provides the first experimental characterization of its complete anisotropic dielectric tensor in the ultraviolet\u2010to\u2010near\u2010infrared regime, conceptually bridging these two spectral domains in which this material finds application. The pronounced out\u2010of\u2010plane birefringence 0.35 suppresses evanescent crosstalk beyond competing van der Waals (vdW) waveguide materials, and the high in\u2010plane anisotropy enables zero\u2010order waveplates at wavelengths as short as 325\u00a0nm. As a practical demonstration, we prepared nanowaveguide which exhibits wavelength\u2010selective light guidance at visible range. Together, these results reposition \u03b1\u2010MoO\n                    <jats:sub>3<\/jats:sub>\n                    from a mid\u2010infrared specific material to a versatile wide\u2010bandgap platform bridging mid\u2010infrared polaritonics and ultraviolet\u2010visible nanophotonics.\n                  <\/jats:p>","DOI":"10.1002\/adma.74228","type":"journal-article","created":{"date-parts":[[2026,7,22]],"date-time":"2026-07-22T11:54:54Z","timestamp":1784721294000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Unveiling \u03b1\u2010MoO\n                    <sub>3<\/sub>\n                    as a High\u2010Index, Low\u2010Loss Anisotropic Material: Bridging the Gap From Mid\u2010Infrared to Ultraviolet Nanophotonics"],"prefix":"10.1002","volume":"38","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5016-1054","authenticated-orcid":false,"given":"Adilet N.","family":"Toksumakov","sequence":"first","affiliation":[{"name":"Emerging Technologies Research Center XPANCEO, Internet City, Emmay Tower  Dubai UAE"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dmitriy V.","family":"Grudinin","sequence":"additional","affiliation":[{"name":"Emerging Technologies Research Center XPANCEO, Internet City, Emmay Tower  Dubai UAE"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0895-818X","authenticated-orcid":false,"given":"Georgy A.","family":"Ermolaev","sequence":"additional","affiliation":[{"name":"Emerging Technologies Research Center XPANCEO, Internet City, Emmay Tower  Dubai UAE"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alexey P.","family":"Tsapenko","sequence":"additional","affiliation":[{"name":"Emerging Technologies Research Center XPANCEO, Internet City, Emmay Tower  Dubai UAE"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anton 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A.","family":"Vyshnevyy","sequence":"additional","affiliation":[{"name":"Emerging Technologies Research Center XPANCEO, Internet City, Emmay Tower  Dubai UAE"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aleksandr S.","family":"Slavich","sequence":"additional","affiliation":[{"name":"Emerging Technologies Research Center XPANCEO, Internet City, Emmay Tower  Dubai UAE"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ivan A.","family":"Kruglov","sequence":"additional","affiliation":[{"name":"Emerging Technologies Research Center XPANCEO, Internet City, Emmay Tower  Dubai UAE"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gleb I.","family":"Tselikov","sequence":"additional","affiliation":[{"name":"Emerging Technologies Research Center XPANCEO, Internet City, Emmay Tower  Dubai UAE"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7506-4389","authenticated-orcid":false,"given":"Aleksey V.","family":"Arsenin","sequence":"additional","affiliation":[{"name":"Emerging Technologies Research Center XPANCEO, Internet City, Emmay Tower  Dubai UAE"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kostya S.","family":"Novoselov","sequence":"additional","affiliation":[{"name":"National Graphene Institute (NGI) University of Manchester  Manchester UK"},{"name":"Department of Materials Science and Engineering National University of Singapore  Singapore Singapore"},{"name":"Institute for Functional Intelligent Materials National University of Singapore  Singapore Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2637-1371","authenticated-orcid":false,"given":"Valentyn S.","family":"Volkov","sequence":"additional","affiliation":[{"name":"Emerging Technologies Research Center XPANCEO, Internet City, Emmay Tower  Dubai 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