Etchless lithium niobate metasurface with silicon-rich nitride patterning enables CW second-harmonic generation at 0.156 % cm²/GW normalized efficiency and exhibits power-dependent resonance evolution, overshoot, and nonideal scaling.
Efficient second harmonic generation by harnessing bound states in the continuum in semi-nonlinear etchless lithium niobate waveguides
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Continuous Wave Second Harmonic Generation from an Etchless Lithium Niobate Resonant Metasurface
Etchless lithium niobate metasurface with silicon-rich nitride patterning enables CW second-harmonic generation at 0.156 % cm²/GW normalized efficiency and exhibits power-dependent resonance evolution, overshoot, and nonideal scaling.