Fig. 4From: Enhanced Nonlinear Optical Effect in Hybrid Liquid Crystal Cells Based on Photonic CrystalWave-vector diagram of self-diffraction of two coherent waves (described by \( {\overrightarrow{k}}_0 \) and \( {\overrightarrow{k}}_1 \)) in the Raman-Nath approximationBack to article page