Multiple Fano resonances with flexible tunablity based on symmetry-breaking resonators

• Xiao bin Ren,
• Kun Ren,
• Ying Zhang,
• Cheng guo Ming and
• Qun Han

Beilstein J. Nanotechnol. 2019, 10, 2459–2467, doi:10.3762/bjnano.10.236

• new opportunities to design on-chip optical devices with great tuning performance. Keywords: multiple Fano resonance; off-centered ring resonators; plasmonic waveguide; surface plasmon polaritons; symmetry-breaking; tunable resonance; Introduction Fano resonances originate from the interference of a

• controlled by the structural parameters (R, r, d, ϕ) and (R2, r2, d2, ϕ2). These results are a great benefit to tunable integrated photonic devices. Conclusion We have demonstrated multiple Fano resonances in a system in which off-centered ring resonators are coupled to a waveguide. By breaking the symmetry