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Lett."],"published-print":{"date-parts":[[2026,7,1]]},"abstract":"<jats:p>Stimulated Brillouin microlasers offer chip-scale light sources with\n\t\t\t\t\thigh spectral purity and low phase noise\u2014key attributes for\n\t\t\t\t\tapplications spanning precision metrology, quantum technologies, and\n\t\t\t\t\tcoherent information processing. However, simultaneously bringing both\n\t\t\t\t\tpump and scattered waves into resonance often compromises photon\n\t\t\t\t\tconfinement or modal volume, resulting in limited conversion\n\t\t\t\t\tefficiency and elevated threshold. In this work, a novel, to the best\n\t\t\t\t\tof our knowledge, approach is proposed to generate Brillouin\n\t\t\t\t\tmicrolasers with high efficiency, low threshold, and narrow linewidth\n\t\t\t\t\tby combining a cross-polarized stimulated Brillouin scattering scheme\n\t\t\t\t\twith intentional Stokes mode splitting to compensate for mode\n\t\t\t\t\tdetuning. Triple-resonance and phase-matching conditions are\n\t\t\t\t\tsimultaneously achieved in a 114-\u00b5m-diameter thin-film lithium niobate\n\t\t\t\t\t(TFLN) microresonator, enabling precise alignment with both the\n\t\t\t\t\t~10\u2009GHz Brillouin shift and the ~100-MHz narrow gain\n\t\t\t\t\tbandwidth. The resulting Brillouin microlaser achieves a narrow\n\t\t\t\t\tintegral linewidth of 185\u2009Hz, an on-chip conversion efficiency of\n\t\t\t\t\t57.92%, and a pump threshold as low as 1.03 mW. Both the conversion\n\t\t\t\t\tefficiency and the lasing threshold represent record-high performance\n\t\t\t\t\tfor the TFLN platform to date.<\/jats:p>","DOI":"10.1364\/ol.599611","type":"journal-article","created":{"date-parts":[[2026,5,27]],"date-time":"2026-05-27T16:00:10Z","timestamp":1779897610000},"page":"3525","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Highly efficient, narrow-linewidth Brillouin microlasers implemented in compact thin-film lithium niobate microresonators"],"prefix":"10.1364","volume":"51","author":[{"given":"Yingnuo","family":"Qiu","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/03g897070","id-type":"ROR","asserted-by":"publisher"}]},{"name":"University of Chinese Academy of Sciences"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chuntao","family":"Li","sequence":"additional","affiliation":[{"name":"East China Normal University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1581-0033","authenticated-orcid":true,"given":"Renhong","family":"Gao","sequence":"additional","affiliation":[{"name":"East China Normal University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaochao","family":"Luo","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/03g897070","id-type":"ROR","asserted-by":"publisher"}]},{"name":"University of Chinese Academy of Sciences"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lingling","family":"Qiao","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/03g897070","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Min","family":"Wang","sequence":"additional","affiliation":[{"name":"East China Normal University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3783-7010","authenticated-orcid":true,"given":"Jintian","family":"Lin","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/03g897070","id-type":"ROR","asserted-by":"publisher"}]},{"name":"University of Chinese Academy of Sciences"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8269-5907","authenticated-orcid":true,"given":"Ya","family":"Cheng","sequence":"additional","affiliation":[{"name":"East China Normal University"},{"name":"Shanghai Research Center for Quantum Sciences"},{"name":"Hefei National Laboratory"},{"name":"Shanxi University"},{"name":"Shandong Normal University"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2026,6,18]]},"reference":[{"key":"ol-51-13-3525-R1","doi-asserted-by":"publisher","first-page":"043902","DOI":"10.1103\/PhysRevLett.102.043902","type":"journal-article","volume":"102","author":"Grudinin","year":"2009","journal-title":"Phys. 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All rights, including\n\t\t\t\t\tfor text and data mining (TDM), Artificial Intelligence (AI) training,\n\t\t\t\t\tand similar technologies, are reserved.","name":"copyright","label":"Copyright"}]}}