期刊
OPTICS LETTERS
卷 48, 期 11, 页码 2837-2840出版社
Optica Publishing Group
DOI: 10.1364/OL.489424
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By using the truncated nano-cone resonator and employing the base angle as a structural degree of freedom, the Q-BIC resonance with a high Q-factor of >150 over a wide wavelength range of > 100 nm can be achieved. Our approach is expected to boost the utilization of Q-BIC resonance in various applications requiring broadband spectral tuning.
To allow a high quality factor (Q-factor) to a sub-wavelength dielectric resonator, quasi-bound states in the continuum (Q-BICs) have gained much interest. However, the Q-BIC resonance condition is too sensitive to the geometry of the resonator, and its practical broadband generation on a single-wafer platform has been limited. Here we present that, employing the base angle as a structural degree of freedom, the truncated nano-cone resonator supports the Q-BIC resonance with a high Q-factor of >150 over a wide wavelength range of > 100 nm. We expect our approach will boost the utilization of the Q-BIC resonance for various applications requiring broadband spectral tuning. (c) 2023 Optica Publishing Group
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