Fig. 1. Hexagonal array grating.

Fig. 2. Numerical simulation TDSI (for Δφ=0.35π); (a)–(d) with respect to distance coefficient β=2, 3, 5, and 10; (e)–(h) with respect to distance coefficient β=0.10, 0.33, 0.50, and 0.70.

Fig. 3. Waveform for the 2D ferroelectric domain inversion MgLN.

Fig. 4. Fabricated MgLN domain inversion patterns; (a) optical microscope image; (b) SEM image.

Fig. 5. Raman spectra collected at the original (noninverted) and domain inverted areas.

Fig. 6. Experimental setup of diffraction self-imaging.

Fig. 7. Experimental TDSI patterns obtains (Δφ=0.35π); (a)–(d) on β=2, 3, 5, and 10 planes; (e)–(h) on β=0.10, 0.33, 0.50, and 0.70 planes.