{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,3]],"date-time":"2026-10-03T05:43:32Z","timestamp":1791006212329,"version":"4.1.0"},"reference-count":36,"publisher":"Optica Publishing Group","issue":"20","license":[{"start":{"date-parts":[[2026,10,2]],"date-time":"2026-10-02T00:00:00Z","timestamp":1790899200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/doi.org\/10.1364\/OA_License_v2#VOR-OA"},{"start":{"date-parts":[[2026,10,2]],"date-time":"2026-10-02T00:00:00Z","timestamp":1790899200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/opg.optica.org\/policies\/opg-tdm-policy.json"}],"funder":[{"name":"Deutsche Forschungsgemeinschaft","award":["SCHM2655\/21-1"],"award-info":[{"award-number":["SCHM2655\/21-1"]}],"id":[{"id":"https:\/\/ror.org\/018mejw64","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":["opg.optica.org"],"crossmark-restriction":false},"short-container-title":["Opt. Express"],"published-print":{"date-parts":[[2026,10,5]]},"abstract":"<jats:p>\n                    Efficient coupling of light into optical fibers is essential for a wide range of applications in telecommunications, sensing, imaging, and quantum photonics. Conventional fiber interfaces typically exhibit a limited angular acceptance interval, restricting their ability to efficiently collect and route light from off-axis sources. Here, we present a 3D-nanoprinted\n                    <jats:italic>Metafiber<\/jats:italic>\n                    that enables angle-selective coupling into a single-mode optical fiber while providing a broadband angular acceptance interval through a multiphase on-fiber grating lens. The device combines directional light coupling with suppression of undesired diffraction orders and is fabricated directly on spacer-enhanced fibers using high-resolution 3D nanoprinting. Optical characterization demonstrates efficient coupling over a substantially extended angular range while maintaining selective excitation of the fiber mode and strong zeroth-order suppression. These results establish a versatile\n                    <jats:italic>Metafiber<\/jats:italic>\n                    platform for directional light collection and spatial demultiplexing, offering new opportunities for fiber-based imaging, sensing, and integrated photonic systems.\n                  <\/jats:p>","DOI":"10.1364\/oe.610827","type":"journal-article","created":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T12:00:08Z","timestamp":1787745608000},"page":"38645","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Grating-lens metafiber with enhanced angular acceptance for broadband light coupling"],"prefix":"10.1364","volume":"34","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-6972-4812","authenticated-orcid":true,"given":"Jun","family":"Sun","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02se0t636","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Friedrich-Schiller-University Jena"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0001-1329-3370","authenticated-orcid":true,"given":"Wenqin","family":"Huang","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02se0t636","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Friedrich-Schiller-University Jena"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5324-6405","authenticated-orcid":true,"given":"Markus A.","family":"Schmidt","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02se0t636","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Friedrich-Schiller-University Jena"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2026,10,2]]},"reference":[{"key":"oe-34-20-38645-R1","doi-asserted-by":"publisher","first-page":"57","DOI":"10.1016\/S1068-5200(02)00527-8","type":"journal-article","volume":"9","author":"Lee","year":"2003","journal-title":"Opt. 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