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Updated: Dec 31, 2025

Fabrication and Characterization of Superconducting Resonators
Published on: May 21, 2016
Multiple Fano resonances with flexible tunablity based on symmetry-breaking resonators
Xiao Bin Ren1, Kun Ren2, Ying Zhang2
1School of Science, Tianjin University of Science and Technology, Tianjin 300222, China.
Abstract:
A symmetry-breaking nanostructure is proposed to achieve multiple Fano resonances. The nanostructure consists of an asymmetric ring resonator coupled to a plasmonic waveguide. The broken symmetry is introduced by deviating the centers of regular ring. New resonant modes that are not accessible through a regular symmetric ring cavity are excited. Thus, one asymmetric cavity can provide more than one resonant mode with the same mode order. As a result, the interval of Fano resonances is greatly reduced. By combining different rings with different degrees of asymmetry, multiple Fano resonances are generated. Those Fano resonances have different dependences on structural parameters due to their different physical origin. The resonance frequency and resonance peak number can be arbitrarily adjusted by changing the degree of asymmetry. This research may provide new opportunities to design on-chip optical devices with great tuning performance.
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