Enhanced second-harmonic generation with Cerenkov radiation scheme in organic film slab-guide at IR lines

摘要

Second-harmonic generation is enhanced with both symmetric and asymmetric slab-guides composed of vinylidene cyanide/vinyl acetate copolymer film and a fused silica in the Cerenkov radiation scheme at Nd:YAG 1.06 mu m and Er:YAG 2.94 mu m laser lines. At 1.06 mu m wavelength an enhancement factor of about five in comparison with a bulk scheme has been obtained with the symmetrical Cerenkovian configuration having the film thickness d approximately=5 mu m. Extending the theory to the experimental model presented, the results are well explained theoretically, and an enhancement of the SHG power by a factor of 50 can be expected if d approximately=0.5 mu m.