@article{Ren2025, 
author = {Peiwen Ren and Zhuo Huang and Renxian Gao and Xiaoxiang Dong and Guoya Sun and Jian-Feng Li and Zhilin Yang},
title = {A strategy to improve the robustness of bound states in the continuum},
year = {2025},
journal = {Nano Research},
volume = {18},
number = {2},
pages = {94907132},
keywords = {bound states in the continuum (BICs), all-dielectric nanostructures, magnetic dipole, electric dipole, robust high Q factor},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94907132},
doi = {10.26599/NR.2025.94907132},
abstract = {Bound states in the continuum (BICs) supported by dielectric metasurfaces have significantly propelled the progress in optical technologies, notably for manipulating potent light-matter interactions. However, achieving a robust quasi-BIC mode with high Q factor by adjusting geometric parameters remains a challenge, primarily the Q factors strongly depend on the asymmetric parameters and the stringent fabrication requirements. Here, we propose a novel strategy to enhance the robustness of the Q factor through the continuous excitation of the magnetic dipole mode with low energy loss. Through a specialized multi-cell structure, the nanoarrays can continuously excite the magnetic dipoles contributed by different structural components over a broad range of geometrical parameters, exhibiting exceptional robustness and high quality resonance. This work provides a theoretical scheme that offers new directions for obtaining robust high Q resonances and developing potential applications for high-performance optical devices.}
}