Overcoming the efficiency-bandwidth tradeoff for optical harmonics generation using nonlinear time-variant resonators

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.

Accepted for publication in Physical Review A

References in corpus (3)

• Topological Photonics
• Dynamic release of trapped light from an ultrahigh-Q nanocavity via adiabatic frequency tuning
• Single Photon Adiabatic Wavelength Conversion

Cited by in corpus (5)

• Continuous wave second harmonic generation enabled by quasi-bound-states in the continuum on gallium phosphide metasurfaces
• High-harmonic generation from metasurfaces empowered by bound states in the continuum
• Temporal Switching to Extend the Bandwidth of Thin Absorbers
• Capturing Broadband Light in a Compact Bound State in the Continuum
• Conversion Matrix Method of Moments for Time-Varying Electromagnetic Analysis