Second-harmonic generation in optical superlattices at the oblique incidence of light

Abstract

We investigate second-harmonic generation (SHG) when light obliquely launches upon optical superlattices, which is optimally devised with the use of a simulated annealing method and can achieve simultaneously a multiple wavelength SHG with a high conversion efficiency. We find that the conversion efficiency at the oblique incidence of light can be increased significantly, compared to that at the normal incidence of light.