ArticleBiomedical optics express2024
High-Q Fano resonances in all-dielectric metastructures for enhanced optical biosensing applications.
Article in Biomedical optics express, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Multimodal Optical Biosensing for Precision Medicine and Healthcare: Introduction to the feature issue.Biomedical optics express · 2026Article
- Multipolar scattering and collective mode engineering in SiO₂@C core-shell nanoparticles and clusters.Scientific reports · 2025Article
- A Reflective Terahertz Point Source Meta-Sensor with Asymmetric Meta-Atoms for High-Sensitivity Bio-Sensing.Biosensors · 2024Article
- Review
- Introduction to the feature issue: Advances in Optical Biosensors for Biomedical Applications.Biomedical optics express · 2024Article
- Multi-function sensing applications based on high Q-factor multi-Fano resonances in an all-dielectric metastructure.Biomedical optics express · 2024Article
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Authors and funding
12 authors.
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Abstract
Fano resonance with high Q-factor is considered to play an important role in the field of refractive index sensing. In this paper, we theoretically and experimentally investigate a refractive index sensor with high performance, realizing a new approach to excite multiple Fano resonances of high Q-factor by introducing an asymmetric parameter to generate a quasi-bound state in the continuum (BIC). Combined with the electromagnetic properties, the formation mechanism of Fano resonances in multiple different excitation modes is analyzed and the resonant modes of the three resonant peaks are analyzed as toroidal dipole (TD), magnetic quadrupole (MQ), and magnetic dipole (MD), respectively. The simulation results show that the proposed metastructure has excellent sensing properties with a Q-factor of 3668, sensitivity of 350 nm/RIU, and figure of merit (FOM) of 1000. Furthermore, the metastructure has been fabricated and investigated experimentally, and the result shows that its maximum Q-factor, sensitivity and FOM can reach 634, 233 nm/RIU and 115, respectively. The proposed metastructure is believed to further contribute to the development of biosensors, nonlinear optics, and lasers.
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