Nonlinear photonic crystals formed by two-dimensional periodic poling of the quadratic susceptibility χ<sup>(2)</sup> can support quasi-phase-matched harmonic generation. The frequency-conversion efficiency depends on the photonic crystal’s poling pattern through certain Fourier coefficients of the poling function. A procedure is described for finding those poling patterns that are most efficient for any specific quasi-phase-matched frequency-conversion scheme.
© 2003 Optical Society of America
Andrew H. Norton and C. Martijn de Sterke, "Optimal poling of nonlinear photonic crystals for frequency conversion," Opt. Lett. 28, 188-190 (2003)