{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T07:05:50Z","timestamp":1790233550346,"version":"4.1.0"},"reference-count":61,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,9,23]],"date-time":"2026-09-23T00:00:00Z","timestamp":1790121600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,9,23]],"date-time":"2026-09-23T00:00:00Z","timestamp":1790121600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100004329","name":"The Slovenian Research and Innovation Agency","doi-asserted-by":"publisher","award":["P1\u20100192"],"award-info":[{"award-number":["P1\u20100192"]}],"id":[{"id":"10.13039\/501100004329","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004329","name":"The Slovenian Research and Innovation Agency","doi-asserted-by":"publisher","award":["P1\u20100125"],"award-info":[{"award-number":["P1\u20100125"]}],"id":[{"id":"10.13039\/501100004329","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004329","name":"The Slovenian Research and Innovation Agency","doi-asserted-by":"publisher","award":["J1\u201050004"],"award-info":[{"award-number":["J1\u201050004"]}],"id":[{"id":"10.13039\/501100004329","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004329","name":"The Slovenian Research and Innovation Agency","doi-asserted-by":"publisher","award":["BI\u2010VB\/25\u201027\u2010011"],"award-info":[{"award-number":["BI\u2010VB\/25\u201027\u2010011"]}],"id":[{"id":"10.13039\/501100004329","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003086","name":"Eusko Jaurlaritza","doi-asserted-by":"publisher","award":["IT1979\u201026"],"award-info":[{"award-number":["IT1979\u201026"]}],"id":[{"id":"10.13039\/501100003086","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["advanced.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Advanced Materials"],"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>Ferroelectric nematic phases are a new class of polar fluids in which spontaneous polarization is directly coupled to the orientational order, providing unique opportunities for creating self\u2010organized materials with spatially modulated electric polarization and nonlinear optical response. Here we report the spontaneous emergence of polarization\u2010modulated textures in a chiral ferroelectric nematic material close to the transition to the chiral twist\u2010bend ferroelectric nematic phase. By systematically varying cell thickness and surface anchoring conditions, we map the formation of these modulated states, revealing stripe, square, and hexagonal morphologies determined via confinement conditions. These structures are directly translated into periodic modulation of the nonlinear optical response, as evidenced by second harmonic generation imaging. Comparison with an elasticity\u2010based theoretical framework and numerical free energy minimization shows that the instability originates from the softening of the bend elastic constant in the chiral nematic phase as the system approaches the lower\u2010temperature heliconical polar phase. The resulting elastic frustration, combined with confinement, drives the formation of spatially periodic director distortions, highlighting ferroelectric nematic fluids as a promising platform for self\u2010assembled nonlinear optical materials.<\/jats:p>","DOI":"10.1002\/adma.75002","type":"journal-article","created":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T06:56:43Z","timestamp":1790233003000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Elasticity\u2010Driven Periodic Polarization Patterns in a Chiral Ferroelectric Nematic Fluid"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-3514-8915","authenticated-orcid":false,"given":"Anej","family":"Sterle","sequence":"first","affiliation":[{"name":"Jo\u017eef Stefan Institute  Ljubljana Slovenia"},{"name":"Faculty of Mathematics and Physics University of Ljubljana  Ljubljana 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of Physics Faculty of Science and Technology University of the Basque Country UPV\/EHU  Bilbao Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3287-8910","authenticated-orcid":false,"given":"Marta","family":"Lavri\u010d","sequence":"additional","affiliation":[{"name":"Jo\u017eef Stefan Institute  Ljubljana Slovenia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2877-8143","authenticated-orcid":false,"given":"Natan","family":"Osterman","sequence":"additional","affiliation":[{"name":"Jo\u017eef Stefan Institute  Ljubljana Slovenia"},{"name":"Faculty of Mathematics and Physics University of Ljubljana  Ljubljana Slovenia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8626-4175","authenticated-orcid":false,"given":"Calum J.","family":"Gibb","sequence":"additional","affiliation":[{"name":"School of Chemistry University of Leeds  Leeds UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-5331-1615","authenticated-orcid":false,"given":"Jordan","family":"Hobbs","sequence":"additional","affiliation":[{"name":"School of Physics and Astronomy University of Leeds  Leeds UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9155-6279","authenticated-orcid":false,"given":"Josu","family":"Martinez\u2010Perdiguero","sequence":"additional","affiliation":[{"name":"Department of Physics Faculty of Science and Technology University of the Basque Country UPV\/EHU  Bilbao Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9816-9661","authenticated-orcid":false,"given":"Richard J.","family":"Mandle","sequence":"additional","affiliation":[{"name":"School of Chemistry University of Leeds  Leeds UK"},{"name":"School of Physics and Astronomy University of Leeds  Leeds UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2766-9121","authenticated-orcid":false,"given":"Alenka","family":"Mertelj","sequence":"additional","affiliation":[{"name":"Jo\u017eef Stefan Institute  Ljubljana Slovenia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9156-1895","authenticated-orcid":false,"given":"Nerea","family":"Sebasti\u00e1n","sequence":"additional","affiliation":[{"name":"Jo\u017eef Stefan Institute  Ljubljana 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