Enhancing harmonics generation by time-variant metasurfaces

We propose and theoretically analyze a scheme that demonstrates generation of enhanced optical harmonics by employing time-variant resonators. We show that the amplitude and phase format of the excitation, as well as the time evolution of the resonator, can be optimized to yield the strongest nonlinear response. We find the conditions for an efficient synthesis of electromagnetic signals that surpass the cavity bandwidth, and discuss a potential experimental realization of this concept.

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