Abstract

In this Letter, we present a mechanism for effectively broadening the bandwidth of second-harmonic generation (SHG) with the metamaterial-based artificial optical nonlinearity. As the nonlinear response of the artificial nonlinearity arising from the magnetoelectric coupling constructed by the meta-molecule (MM) structure, the broadband second-order nonlinearity can be built by simply combining the MMs with different geometrical sizes together. The physical model and the numerical simulation fully support the artificial generation and modulation of the broadband second harmonics. Our work suggests a new route for realizing the on-chip custom-designed nonlinear optical devices with broadband operation.

© 2021 Optical Society of America

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Supplementary Material (1)

NameDescription
» Supplement 1       Mathematical details, simulation settings, schematics of the control samples, linear spectra, extraction of second harmonics, reflection spectrum of SHG, intensity and polarization dependences of SHG, fields decomposition, and dark mode resonance.

Data Availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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