{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T10:18:06Z","timestamp":1785406686455,"version":"3.56.0"},"reference-count":27,"publisher":"Optica Publishing Group","issue":"13","license":[{"start":{"date-parts":[[2026,6,22]],"date-time":"2026-06-22T00:00:00Z","timestamp":1782086400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/doi.org\/10.1364\/OA_License_v2#VOR"},{"start":{"date-parts":[[2026,6,22]],"date-time":"2026-06-22T00:00:00Z","timestamp":1782086400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/opg.optica.org\/policies\/opg-tdm-policy.json"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"crossref","award":["61805210"],"award-info":[{"award-number":["61805210"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"crossref"},{"id":"https:\/\/ror.org\/01h0zpd94","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":["opg.optica.org"],"crossmark-restriction":false},"short-container-title":["Opt. Lett."],"published-print":{"date-parts":[[2026,7,1]]},"abstract":"<jats:p>\n                    We propose an all-dielectric, self-confined cavity that supports a flat-band quasi-guided mode (QGM) to realize an ultracompact nanolaser. By setting a spacer layer between the grating and the waveguide layer, precise band engineering is achieved. Subsequently, introducing periodic perturbations folds the GM into the light cone, forming a flat-band QGM. Benefiting from the slow-light effect induced by the flat band and the inherently low radiation loss of the GM, both in-plane photon leakage and radiative loss are suppressed. Consequently, a cavity with a quality factor of approximately 2.4\u202f\u00d7\u202f10\n                    <jats:sup>3<\/jats:sup>\n                    is achieved within only 10 unit cells (5.7 \u03bb). The flat-band QGM enables a single-mode C-band laser with a low threshold electric-field amplitude of 7.7\u202f\u00d7\u202f10\n                    <jats:sup>5<\/jats:sup>\n                    \u202fV\/m, despite the minimal number of unit cells. Notably, the unique field distribution of the high-frequency flat-band mode also provides significant robustness against variations in grating depth. This flat-band-assisted design can be extended to other wavelength ranges, providing a path toward power-efficient, on-chip, and compact lasers.\n                  <\/jats:p>","DOI":"10.1364\/ol.603981","type":"journal-article","created":{"date-parts":[[2026,6,1]],"date-time":"2026-06-01T12:00:09Z","timestamp":1780315209000},"page":"3569","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Ultracompact nanolasers based on flat-band quasi-guided modes"],"prefix":"10.1364","volume":"51","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1475-5928","authenticated-orcid":true,"given":"Linyong","family":"Qian","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/051hvcm98","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yiwen","family":"Cui","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/051hvcm98","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0709-9544","authenticated-orcid":true,"given":"Kangni","family":"Wang","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/051hvcm98","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2026,6,22]]},"reference":[{"key":"ol-51-13-3569-R1","doi-asserted-by":"publisher","first-page":"16048","DOI":"10.1038\/natrevmats.2016.48","type":"journal-article","volume":"1","author":"Hsu","year":"2016","journal-title":"Nat. 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All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.","name":"copyright","label":"Copyright"}]}}