{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,22]],"date-time":"2026-09-22T13:59:29Z","timestamp":1790085569029,"version":"4.0.1"},"reference-count":34,"publisher":"AIP Publishing","issue":"9","funder":[{"name":"Key R & D Project From the Ministry of Science and Technology of China","award":["2024YFA1207900"],"award-info":[{"award-number":["2024YFA1207900"]}],"id":[{"id":"https:\/\/ror.org\/02kv4zf79","id-type":"ROR","asserted-by":"crossref"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["12574052"],"award-info":[{"award-number":["12574052"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2026,9,1]]},"abstract":"<jats:p>Accurate thermal conductivity characterization is essential for understanding heat transport mechanisms and optimizing thermal management in emerging low-dimensional materials. However, the determination of thermal conductivity components along different in-plane directions remains experimentally challenging and often requires specialized measurement configurations or complex thermal modeling. Here, we present a Raman laser self-heating technique capable of extracting in-plane thermal conductivities along multiple in-plane directions within a single measurement platform. In this approach, a focused Raman laser serves as a localized non-contact heating source, while the resulting steady-state thermal response is monitored through the integrated thermal sensing islands. A finite-element heat-transfer model is further established based on the actual device geometry, and the thermal conductivities are subsequently determined through inverse analysis using a particle swarm optimization algorithm. The proposed technique is validated using silicon nitride (SiNx) thin films, yielding thermal conductivity values within 5% of those measured by the suspended thermal bridge method. The Raman laser self-heating technique provides a practical and versatile approach for thermophysical property characterization of thin-film materials and can be readily extended to systems exhibiting anisotropic thermal transport.<\/jats:p>","DOI":"10.1063\/5.0347921","type":"journal-article","created":{"date-parts":[[2026,9,22]],"date-time":"2026-09-22T13:00:55Z","timestamp":1790082055000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":0,"title":["Raman laser self-heating technique for thermal characterization of two-dimensional materials"],"prefix":"10.1063","volume":"97","author":[{"ORCID":"https:\/\/orcid.org\/0009-0004-4257-4210","authenticated-orcid":false,"given":"Dechen","family":"Wei","sequence":"first","affiliation":[{"name":"Phonon Engineering Research Center of Jiangsu Province, Center for Quantum Transport and Thermal Energy Science, Institute of Physics Frontiers and Interdisciplinary Sciences, School of Physics and Technology, Nanjing Normal University , Nanjing 210023,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shuai","family":"Wu","sequence":"additional","affiliation":[{"name":"Phonon Engineering Research Center of Jiangsu Province, Center for Quantum Transport and Thermal Energy Science, Institute of Physics Frontiers and Interdisciplinary Sciences, School of Physics and Technology, Nanjing Normal University , Nanjing 210023,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0003-0352-5961","authenticated-orcid":false,"given":"Lei","family":"Zhao","sequence":"additional","affiliation":[{"name":"Phonon Engineering Research Center of Jiangsu Province, Center for Quantum Transport and Thermal Energy Science, Institute of Physics Frontiers and Interdisciplinary Sciences, School of Physics and Technology, Nanjing Normal University , Nanjing 210023,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Youlin","family":"Mao","sequence":"additional","affiliation":[{"name":"Phonon Engineering Research Center of Jiangsu Province, Center for Quantum Transport and Thermal Energy Science, Institute of Physics Frontiers and Interdisciplinary Sciences, School of Physics and Technology, Nanjing Normal University , Nanjing 210023,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3440-4356","authenticated-orcid":false,"given":"Yunshan","family":"Zhao","sequence":"additional","affiliation":[{"name":"Phonon Engineering Research Center of Jiangsu Province, Center for Quantum Transport and Thermal Energy Science, Institute of Physics Frontiers and Interdisciplinary Sciences, School of Physics and Technology, Nanjing Normal University , Nanjing 210023,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"317","published-online":{"date-parts":[[2026,9,22]]},"reference":[{"issue":"4","key":"2026092209004732600_c1","doi-asserted-by":"publisher","first-page":"235","DOI":"10.1038\/nnano.2008.417","volume":"4","year":"2009","journal-title":"Nat. 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