Abstract

We investigate one-dimensional nonlinear photonic crystals consisting of ferroelectric domains with the modulated polarization direction. The optimal arrangement of the polarization directions of the ferroelectric domains can be achieved with the use of the simulated annealing method. We find that the second-harmonic generation (SHG) is increased significantly when the frequencies of the fundamental wave aim at the photonic band edges and the special arrangement of the polarization directions of the ferroelectric domains is satisfied. The optimal structure can achieve simultaneously multiple wavelength SHGs with nearly identical conversion efficiencies for both the “forward” and “backward” SHGs.

© 2008 Optical Society of America

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