Abstract
In this work, we conceive and demonstrate the magneto-electric double Fano resonances of a hetero-cavity composed of Si disk and Au split ring, where Si disk can provide additional magnetic responses besides electric responses. The interference between electric and magnetic responses in proposed hetero-cavity gives rise to magneto-electric double Fano resonances with magnetic and electric near-field enhancements. Dipole radiative enhancement is used to analyze magnetic and electric responses of hetero-cavity and the spectral features of hetero-cavity can be used to quantitatively characterize by coupled oscillator model. And the spectral tunability of magneto-electric double Fano resonances is investigated, highlighting a potential for applications in low-loss sensing and nanophotonic devices.
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This work was supported by the key project of the Natural Science Foundation of Tianjin City under Grant No 10JCZDJC23600.
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Hao, Z., Gao, Y., Huang, Z. et al. Magneto-Electric Double Fano Resonances in Hybrid Split Ring/Disk Hetero-Cavity. Plasmonics 13, 1541–1547 (2018). https://doi.org/10.1007/s11468-017-0662-6
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DOI: https://doi.org/10.1007/s11468-017-0662-6