Overcoming the efficiency-bandwidth tradeoff for optical harmonics generation using nonlinear time-variant resonators
arXiv:1911.02036 · doi:10.1103/PhysRevA.100.063847
Abstract
Highly resonant photonic structures, such as cavities and metasurfaces, can dramatically enhance the efficiency of nonlinear processes by utilizing strong optical field enhancement at the resonance. The latter, however, comes at the expense of the bandwidth. Here, we overcome such tradeoff by utilizing time-varying resonant structures. Using harmonics generation as an example, 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.
arXiv commentAccepted for publication in Physical Review A
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- Conversion Matrix Method of Moments for Time-Varying Electromagnetic Analysis