Slow-Light Enhanced Second-Harmonic Generation Using a π-Phase Shifted Moiré Grating in a Quasi-Phased-Matched Medium

Slow light is the phenomenon of a large reduction in group velocity, normally due to a material resonance [1] . Slow light causes spatial compression and consequently large field enhancement which has been suggested as a method for increasing nonlinear optical effects. Here we investigate the use of a Moiré grating [2] , [3] for enhancing second-harmonic generation (SHG) in a χ (2) medium.