{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,15]],"date-time":"2026-05-15T13:14:14Z","timestamp":1778850854299,"version":"3.51.4"},"reference-count":50,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2026,4,30]],"date-time":"2026-04-30T00:00:00Z","timestamp":1777507200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,4,30]],"date-time":"2026-04-30T00:00:00Z","timestamp":1777507200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100012166","name":"National Key Research and Development Program of China","doi-asserted-by":"publisher","award":["2023YFB4605101"],"award-info":[{"award-number":["2023YFB4605101"]}],"id":[{"id":"10.13039\/501100012166","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["52305595"],"award-info":[{"award-number":["52305595"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["U22A20205"],"award-info":[{"award-number":["U22A20205"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["52575647"],"award-info":[{"award-number":["52575647"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100007129","name":"Natural Science Foundation of Shandong Province","doi-asserted-by":"publisher","award":["ZR2023QE169"],"award-info":[{"award-number":["ZR2023QE169"]}],"id":[{"id":"10.13039\/501100007129","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100012226","name":"Fundamental Research Funds for the Central Universities","doi-asserted-by":"publisher","award":["22CX06062A"],"award-info":[{"award-number":["22CX06062A"]}],"id":[{"id":"10.13039\/501100012226","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Nanophotonics"],"published-print":{"date-parts":[[2026,5,13]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Lithium niobate (LiNbO\n                    <jats:sub>3<\/jats:sub>\n                    ) is a key material for nonlinear optics applications, such as second harmonic generation (SHG), due to its strong nonlinear coefficient and broad transparency window. However, its high damage threshold makes it difficult to fabricate high\u2010quality microstructures, often resulting in low quality factors and poor SHG efficiency. Femtosecond lasers are well suited for processing transparent materials, but conventional ablation typically introduces surface cracks and scattering centers that degrade optical performance. In this study, we develop a one\u2010step femtosecond laser modification method to create periodic metasurfaces on LiNbO\n                    <jats:sub>3<\/jats:sub>\n                    thin films without ablation. Compared to ablated structures, the laser\u2010modified regions exhibit minimal surface damage and avoid microcracking. The designed periodic structures facilitate efficient second\u2010harmonic generation through complementary mechanisms: the laser\u2010modified regions introduce a longitudinal focusing effect that locally enhances the optical field, whereas the periodic index modulation enables grating coupling to guided\u2010mode resonances under oblique incidence. Experimental results demonstrate a 4.75\u2010fold enhancement in SHG efficiency under 1030\u00a0nm\u00a0femtosecond laser irradiation at oblique incidence. The mechanisms are analyzed using finite\u2010difference time\u2010domain simulation and Raman spectroscopy characterization. This work provides a simple and damage\u2010free strategy for manufacturing high\u2010performance nonlinear photonic devices, facilitating applications in integrated photonic circuits.\n                  <\/jats:p>","DOI":"10.1002\/nap2.70096","type":"journal-article","created":{"date-parts":[[2026,4,30]],"date-time":"2026-04-30T08:05:33Z","timestamp":1777536333000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["One\u2010Step Fabrication of Non\u2010Ablative Microstructures for Efficient Second Harmonic Generation on LiNbO\n                    <sub>3<\/sub>\n                    Thin Film"],"prefix":"10.1002","volume":"15","author":[{"given":"Feifei","family":"Wang","sequence":"first","affiliation":[{"name":"College of Control Science and Engineering China University of Petroleum (East China)  Qingdao China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuntao","family":"Lang","sequence":"additional","affiliation":[{"name":"College of Control Science and Engineering China University of Petroleum (East China)  Qingdao China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-8779-9103","authenticated-orcid":false,"given":"Changji","family":"Pan","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering and Automation Fuzhou University  Fuzhou China"},{"name":"Department of Physics ETH Zurich  Zurich Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yang","family":"Lu","sequence":"additional","affiliation":[{"name":"College of Control Science and Engineering China University of Petroleum (East China)  Qingdao China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaozhe","family":"Chen","sequence":"additional","affiliation":[{"name":"College of Control Science and Engineering China University of Petroleum (East China)  Qingdao China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rongke","family":"Gao","sequence":"additional","affiliation":[{"name":"College of Control Science and Engineering China University of Petroleum (East China)  Qingdao China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhe","family":"Peng","sequence":"additional","affiliation":[{"name":"College of Control Science and Engineering China University of Petroleum (East China)  Qingdao China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Liandong","family":"Yu","sequence":"additional","affiliation":[{"name":"College of Control Science and Engineering China University of Petroleum (East China)  Qingdao 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