Enhancement of second-harmonic generation in LiNbO3 crystals with periodic laminar ferroelectric domains

Abstract

Using the Czochralski method we have grown LiNbO3 crystals with periodic laminar ferroelectric domains whose half-period nearly corresponds to the coherence length. Quasi-phase-matching for the nonlinear optical coefficient d33 has been approximately realized and enhancement of second-harmonic generation relative to conventionally phase-matched crystals of the same length has been observed.