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Two-oscillator model of trapped-modes interaction in a nonlinear bilayer fish-scale metamaterial | Superconducting Quantum Devices Laboratory

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Two-oscillator model of trapped-modes interaction in a nonlinear bilayer fish-scale metamaterial

Vladimir R Tuz, Bogdan A Kochetov, Lyudmila A Kochetova, Pavel L Mladyonov and Sergey L Prosvirnin

We discuss a similarity between resonant oscillations in two nonlinear systems; namely, a chain 
of coupled Duffing oscillators and a bilayer fish-scale metamaterial. In such systems two
different resonant states arise which differ in their spectral lines. The spectral line of the first
resonant state has a Lorentzian form, whereas the second one has a Fano form. This difference
leads to a specific nonlinear response of the systems which manifests itself in the appearance of
closed loops in spectral lines and bending and overlapping of resonant curves. Conditions for
achieving bistability and multistability are determined.