| Autor: |
Huang L, Ding C, Ren J, Sun S, Wang W, Lai WY |
| Jazyk: |
angličtina |
| Zdroj: |
Optics letters [Opt Lett] 2024 Oct 15; Vol. 49 (20), pp. 5890-5892. |
| DOI: |
10.1364/OL.539081 |
| Abstrakt: |
Non-radiative bound states in the continuum (BICs) allow the construction of resonances with high-quality (Q) factors and have emerged as an attractive platform for manipulating light-matter interactions on the nanoscale. However, current studies on symmetry-protected BICs (SP-BICs) suffer from a fundamental trade-off between the Q factor and asymmetric parameters, presenting a significant hurdle for practical applications. Here, utilizing the eigenfield perturbations, we successfully break the conventional inverse quadratic law of the SP-BICs and realize the robust high-Q resonances against the asymmetric parameters. We find the introductions of the central notch can efficiently boost the resonance of the electric quadrupole, which results in the enhancement of multiple-mode interference, and thus improving Q factors, while the constant effective refractive index guarantees the resonance with a stable wavelength. Our findings provide a promising strategy for modulating the light-matter interaction and may pave the way for applications in future high-performance optoelectronic devices. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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