Dynamically tunable robust ultrahigh-Q merging bound states in the continuum in phase-change materials metasurface.

ABSTRACT: Bound states in the continuum (BICs) are localized states within the radiative continuum that exhibit high quality-factor (Q-factor) resonance, which significantly boosts light-matter interactions. However, out-of-plane radiation losses can arise from inherent material absorption and inevitable technological imperfections during fabrication process. Merging BICs have been introduced as a solution to address the issue of out-of-plane radiation losses. By merging BICs, it is possible to expand the area of high Q-factor resonance in momentum space, thereby enhancing the system's robustness against external perturbations. However, achieving this enhancement is contingent upon altering the geometrical parameters of the structure, which inherently restricts its dynamic tunability. Here, we propo

SUBMITTER: Ren H 

PROVIDER: S-EPMC11831385 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature