Effect of phase mismatch on second-harmonic generation in negative-index materials

摘要

Second-harmonic generation in negative-index metamaterials is considered. Theoretical analysis of thencorresponding model demonstrates a significant difference of this phenomenon in conventional and negative-indexnmaterials. For example, and in contrast to conventionalmaterials, there is nonzero critical phase mismatch. The behaviornof interactingwaves is dramatically differentwhen phase mismatch is smaller or greater than a critical value.