![]() ![]() Dashed gray line depicts the domain wall. Purple arrows points to the direction of motion. For comparison, the linear beam evolution, i.e., with nonlinearity switched off, is shown in the bottom panels and with dotted red lines. (a), (b) Intensity distributions of the nonlinear beam (top panels, blue line) at propagation distances (a) z = 11 mm (left column) and (b) z = 22 mm (right column). The input beam has a Gaussian envelope along the domain wall with maximum intensity I 0 = 2.5 × 10 15 W/ m 2. Nonlinear dynamics of the optical beam at the valley-Hall domain wall at a zigzag interface in a honeycomb lattice of laser-written waveguides. ![]()
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