{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,27]],"date-time":"2026-07-27T05:58:48Z","timestamp":1785131928964,"version":"3.55.0"},"reference-count":40,"publisher":"Wiley","issue":"14","license":[{"start":{"date-parts":[[2026,7,21]],"date-time":"2026-07-21T00:00:00Z","timestamp":1784592000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,7,21]],"date-time":"2026-07-21T00:00:00Z","timestamp":1784592000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["62305174"],"award-info":[{"award-number":["62305174"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004543","name":"China Scholarship Council","doi-asserted-by":"publisher","award":["202408320325"],"award-info":[{"award-number":["202408320325"]}],"id":[{"id":"10.13039\/501100004543","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100008048","name":"Nanjing University","doi-asserted-by":"publisher","award":["M38028"],"award-info":[{"award-number":["M38028"]}],"id":[{"id":"10.13039\/501100008048","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100005374","name":"Nanjing University of Posts and Telecommunications","doi-asserted-by":"publisher","award":["NY222076"],"award-info":[{"award-number":["NY222076"]}],"id":[{"id":"10.13039\/501100005374","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>\n                    Chiral bound states in the continuum (BICs) with infinite radiation quality factor (\n                    <jats:italic>Q<\/jats:italic>\n                    \u2010factor) and topological robustness have provided a new paradigm for enhancing chiral light\u2013matter interaction. However, the strong momentum\u2010space dispersion leads to a rapid collapse of the\n                    <jats:italic>Q<\/jats:italic>\n                    \u2010factor when the resonance deviates from the ideal BICs condition, severely limiting its practical applications. Here, by strategically engineering the interaction among four counterpropagating folded guided modes, we theoretically propose and numerically realize the chiral flatband quasi\u2010BICs. The pronounced chiroptical response arises from the destructive interference of two antiphase oscillating intrinsic modes, whereas the flatband characteristic originates from the interactions among opposite curvature hybrid guided modes. Compared with conventional BICs featuring strongly dispersive bands, our dispersionless BICs provide stronger light field confinement, enabling highly efficient third\u2010harmonic generation (conversion efficiency up to 2.3\u00a0\u00d7\u00a010\n                    <jats:sup>\u22123<\/jats:sup>\n                    under a pump intensity of 1\u00a0MW\/cm\n                    <jats:sup>\u22122<\/jats:sup>\n                    ). Our work establishes a new benchmark for miniaturized nonlinear chiral sources and may pave the way for the development of novel chiral optical device.\n                  <\/jats:p>","DOI":"10.1002\/nap2.70218","type":"journal-article","created":{"date-parts":[[2026,7,22]],"date-time":"2026-07-22T06:35:41Z","timestamp":1784702141000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Robust Chiral High\u2010\n                    <i>Q<\/i>\n                    Response Driven by Quasi\u2010Bound Flatband in the Continuum"],"prefix":"10.1002","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-0512-3212","authenticated-orcid":false,"given":"Lei","family":"Huang","sequence":"first","affiliation":[{"name":"State Key Laboratory of Flexible Electronics College of Chemistry and Life Sciences, College of Electronic and Optical Engineering Nanjing University of Posts and Telecommunications  Nanjing China"},{"name":"National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences Nanjing University  Nanjing China"},{"name":"Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University  Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Weiqing","family":"Wang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Flexible Electronics College of Chemistry and Life Sciences, College of Electronic and Optical Engineering Nanjing University of Posts and Telecommunications  Nanjing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Han","family":"Shen","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Flexible Electronics College of Chemistry and Life Sciences, College of Electronic and Optical Engineering Nanjing University of Posts and Telecommunications  Nanjing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jing","family":"Chen","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Flexible Electronics College of Chemistry and Life Sciences, College of Electronic and Optical Engineering Nanjing University of Posts and Telecommunications  Nanjing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shifeng","family":"Li","sequence":"additional","affiliation":[{"name":"National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences Nanjing University  Nanjing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6920-7016","authenticated-orcid":false,"given":"Biao","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Physics Central South University  Changsha Hunan China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fuhuan","family":"Shen","sequence":"additional","affiliation":[{"name":"Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University  Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,7,21]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.201205178"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1126\/sciadv.1602735"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.104.163901"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1017\/CBO9780511535468"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1038\/ncomms14180"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41467\u2010022\u201030966\u20105"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.113.257401"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.125.093903"},{"key":"e_1_2_8_10_1","doi-asserted-by":"publisher","DOI":"10.1002\/lpor.202200597"},{"key":"e_1_2_8_11_1","doi-asserted-by":"publisher","DOI":"10.1002\/lpor.202503270"},{"key":"e_1_2_8_12_1","doi-asserted-by":"publisher","DOI":"10.1186\/s43593\u2010026\u201000126\u2010z"},{"key":"e_1_2_8_13_1","doi-asserted-by":"publisher","DOI":"10.1364\/OL.36.003359"},{"key":"e_1_2_8_14_1","doi-asserted-by":"publisher","DOI":"10.1364\/OL.462021"},{"key":"e_1_2_8_15_1","doi-asserted-by":"publisher","DOI":"10.1364\/oe.570814"},{"key":"e_1_2_8_16_1","doi-asserted-by":"publisher","DOI":"10.1364\/oe.511175"},{"key":"e_1_2_8_17_1","doi-asserted-by":"publisher","DOI":"10.1364\/OL.44.000287"},{"key":"e_1_2_8_18_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.nanolett.1c02751"},{"key":"e_1_2_8_19_1","doi-asserted-by":"publisher","DOI":"10.1364\/PRJ.477385"},{"key":"e_1_2_8_20_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.nanolett.6c01221"},{"key":"e_1_2_8_21_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.128.253901"},{"key":"e_1_2_8_22_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41467\u2010025\u201065860\u20103"},{"key":"e_1_2_8_23_1","doi-asserted-by":"publisher","DOI":"10.1364\/OL.539081"},{"key":"e_1_2_8_24_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.nanolett.2c04936"},{"key":"e_1_2_8_25_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsnano.5c01972"},{"key":"e_1_2_8_26_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.134.103801"},{"key":"e_1_2_8_27_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsami.2c03688"},{"key":"e_1_2_8_28_1","doi-asserted-by":"publisher","DOI":"10.1063\/5.0054332"},{"key":"e_1_2_8_29_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsphotonics.6b00219"},{"key":"e_1_2_8_30_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.121.033903"},{"key":"e_1_2_8_31_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41467\u2010022\u201031653\u20100"},{"key":"e_1_2_8_32_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.abq7870"},{"key":"e_1_2_8_33_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41586\u2010022\u201005467\u20106"},{"key":"e_1_2_8_34_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.108.155410"},{"key":"e_1_2_8_35_1","doi-asserted-by":"publisher","DOI":"10.1002\/adom.202303195"},{"key":"e_1_2_8_36_1","doi-asserted-by":"publisher","DOI":"10.1364\/OL.534860"},{"key":"e_1_2_8_37_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.134.013805"},{"key":"e_1_2_8_38_1","doi-asserted-by":"publisher","DOI":"10.1364\/OL.555234"},{"key":"e_1_2_8_39_1","doi-asserted-by":"publisher","DOI":"10.1126\/sciadv.ads9562"},{"key":"e_1_2_8_40_1","doi-asserted-by":"publisher","DOI":"10.1126\/sciadv.adw0986"},{"key":"e_1_2_8_41_1","doi-asserted-by":"publisher","DOI":"10.1117\/1.AP.7.5.056008"}],"container-title":["Nanophotonics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/nap2.70218","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1002\/nap2.70218","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/nap2.70218","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,7,27]],"date-time":"2026-07-27T04:59:48Z","timestamp":1785128388000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/nap2.70218"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,7,21]]},"references-count":40,"journal-issue":{"issue":"14","published-print":{"date-parts":[[2026,7,27]]}},"alternative-id":["10.1002\/nap2.70218"],"URL":"https:\/\/doi.org\/10.1002\/nap2.70218","archive":["Portico"],"relation":{},"ISSN":["2192-8614","2192-8614"],"issn-type":[{"value":"2192-8614","type":"print"},{"value":"2192-8614","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,7,21]]},"assertion":[{"value":"2026-02-13","order":0,"nam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