Higher harmonic anti-resonances in nonlinear coupled systems
摘要
The phenomenon of anti-resonance arises when the frequency of a periodic drive exciting one of the oscillators of a coupled system is systematically varied. This counter-resonance effect, a result of the interference of the drive and the coupling, is examined in non-linear systems in search of anti-resonance response of the driven component at the higher harmonics. It has been shown that contrary to our expectation this interference leaves an imprint of non-linearity in the linear response function. The spectral function of the anti-resonance response at a higher harmonic behaves similarly as that for the lower harmonic. Our perturbative results have been verified by full numerical simulations.
Graphic abstractIt is possible to manipulate the strength of the time periodic field to obtain a dip or transparency at the response at the second harmonic of the field in a coupled oscillator system.