{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"omics_type":["Unknown"],"volume":["14(21)"],"submitter":["Liu H"],"pubmed_abstract":["Photonic bound states in the continuum (BICs) are optical modes that remain highly localized despite co-existing with radiating waves in the continuum, attracting considerable attention for both fundamental studies and technological innovations. Conventional single-mode BIC lasers predominantly focus on maximizing the Q-factor of a specific mode, often overlooking the critical role of Q-contrast - the difference in Q-factors between the highest-Q BIC mode and competing modes - which is crucial for achieving stable single-mode lasing. In this study, we present a compact, high Q-contrast BIC laser, enabled by strategically optimizing the alignment of the TM<sub>1</sub> band of the core domain with the shell domain to confine the high Q-factor mode within the core. Using a quantum cascade las"],"journal":["Nanophotonics (Berlin, Germany)"],"pagination":["3433-3441"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC12552860"],"repository":["biostudies-literature"],"pubmed_title":["High Q-contrast terahertz quantum cascade laser via bandgap-confined bound state in the continuum."],"pmcid":["PMC12552860"],"pubmed_authors":["Liu H","Linfield EH","Wang Q","Cui J","Davies AG","Wang QJ","Li L"],"additional_accession":[]},"is_claimable":false,"name":"High Q-contrast terahertz quantum cascade laser via bandgap-confined bound state in the continuum.","description":"Photonic bound states in the continuum (BICs) are optical modes that remain highly localized despite co-existing with radiating waves in the continuum, attracting considerable attention for both fundamental studies and technological innovations. Conventional single-mode BIC lasers predominantly focus on maximizing the Q-factor of a specific mode, often overlooking the critical role of Q-contrast - the difference in Q-factors between the highest-Q BIC mode and competing modes - which is crucial for achieving stable single-mode lasing. In this study, we present a compact, high Q-contrast BIC laser, enabled by strategically optimizing the alignment of the TM<sub>1</sub> band of the core domain with the shell domain to confine the high Q-factor mode within the core. Using a quantum cascade las","dates":{"release":"2025-01-01T00:00:00Z","publication":"2025 Oct","modification":"2026-06-05T05:11:21.774Z","creation":"2026-05-13T14:29:19.929Z"},"accession":"S-EPMC12552860","cross_references":{"pubmed":["41142095"],"doi":["10.1515/nanoph-2024-0757"]}}