{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,27]],"date-time":"2026-07-27T05:58:53Z","timestamp":1785131933431,"version":"3.55.0"},"reference-count":51,"publisher":"Wiley","issue":"14","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\/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"}],"funder":[{"DOI":"10.13039\/501100006769","name":"Russian Science Foundation","doi-asserted-by":"publisher","award":["25\u201072\u201000149"],"award-info":[{"award-number":["25\u201072\u201000149"]}],"id":[{"id":"10.13039\/501100006769","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Nanophotonics"],"published-print":{"date-parts":[[2026,7,27]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>Organic semiconductors are particularly attractive for polaritonics due to their large exciton binding energies and oscillator strengths. Among them, the ladder\u2010type conjugated polymer poly(paraphenylene) is distinguished by its rigid backbone, narrow exciton linewidth, high photoluminescence quantum yield, and enhanced photostability, making it an excellent candidate for organic polariton devices. Although polariton lasing has been reported in various organic systems, systematic studies of the transition from polariton lasing to conventional photon lasing within a single, well\u2010controlled material platform remain limited. Here, we present planar organic microcavities incorporating MeLPPP as the active medium, in which continuous tuning of the effective cavity length within a single device enables us to map the strong\u2010to\u2010weak coupling transition across five distinct cavity\u2010mode orders. We demonstrate an approximately eighteen\u2010fold increase in the lasing threshold when crossing from polariton to photon lasing. We further establish a quantitative framework in which the spectral dependence of the threshold governs a universal V\u2010shaped blueshift of the emission energy across both coupling regimes. Finally, we show that vibron\u2010mediated exciton relaxation, previously identified in the strong\u2010coupling limit, persists across the crossover: lasing\u2010threshold minima track the vibron resonances throughout the coupling transition.<\/jats:p>","DOI":"10.1002\/nap2.70214","type":"journal-article","created":{"date-parts":[[2026,7,22]],"date-time":"2026-07-22T09:13:08Z","timestamp":1784711588000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Mapping the Strong\u2010to\u2010Weak Coupling Crossover in Polymer\u2010Film Microcavity Lasers"],"prefix":"10.1002","volume":"15","author":[{"given":"Denis A.","family":"Sannikov","sequence":"first","affiliation":[{"name":"Hybrid Photonics Laboratory Skolkovo Institute of Science and Technology Territory of Innovation Center Skolkovo  Moscow Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nailya M.","family":"Urazova","sequence":"additional","affiliation":[{"name":"Hybrid Photonics Laboratory Skolkovo Institute of Science and Technology Territory of Innovation Center Skolkovo  Moscow Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maksim D.","family":"Kolker","sequence":"additional","affiliation":[{"name":"Hybrid Photonics Laboratory Skolkovo Institute of Science and Technology Territory of Innovation Center Skolkovo  Moscow Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Grigorij D.","family":"Ivanov","sequence":"additional","affiliation":[{"name":"Hybrid Photonics Laboratory Skolkovo Institute of Science and Technology Territory of Innovation Center Skolkovo  Moscow Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9192-1344","authenticated-orcid":false,"given":"Anton D.","family":"Putintsev","sequence":"additional","affiliation":[{"name":"Hybrid Photonics Laboratory Skolkovo Institute of Science and Technology Territory of Innovation Center Skolkovo  Moscow Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aleksandr V.","family":"Averchenko","sequence":"additional","affiliation":[{"name":"Hybrid Photonics Laboratory Skolkovo Institute of Science and Technology Territory of Innovation Center Skolkovo  Moscow Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daria","family":"Khmelevskaia","sequence":"additional","affiliation":[{"name":"Hybrid Photonics Laboratory Skolkovo Institute of Science and Technology Territory of Innovation Center Skolkovo  Moscow Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Liliya T.","family":"Sahharova","sequence":"additional","affiliation":[{"name":"Zelinsky Institute of Organic Chemistry Russian Academy of Sciences  Moscow Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nikita S.","family":"Shlapakov","sequence":"additional","affiliation":[{"name":"Zelinsky Institute of Organic Chemistry Russian Academy of Sciences  Moscow Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ioannis","family":"Paschos","sequence":"additional","affiliation":[{"name":"Westlake University  Hangzhou Zhejiang China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8186-6679","authenticated-orcid":false,"given":"Pavlos G.","family":"Savvidis","sequence":"additional","affiliation":[{"name":"Westlake University  Hangzhou Zhejiang China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6447-557X","authenticated-orcid":false,"given":"Valentine P.","family":"Ananikov","sequence":"additional","affiliation":[{"name":"Zelinsky Institute of Organic Chemistry Russian Academy of Sciences  Moscow 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