Figure 4
From: Collapse on the line – how synthetic dimensions influence nonlinear effects
Experimentally detected evolution of a broad excitation in the presence of a gap (φ0 = π/2) and for different power levels demonstrating wave collapse at mW power level (bottom row). The system is excited with a sequence of pulses with a Gaussian envelope (black dashed line) as shown in the (a) time domain, (b) a 3D surface plot and (c) a 2D image with normalized scaled colors. d-f Linear diffraction of a Gaussian beam on the lattice (time step m = 60, 0.3 mW input power). (g–i) Townes-like soliton for intermediate power (time step m = 60, 1.0 mW input power). (j–l) Collapse of the field distribution into a single lattice site at the highest power level (time step m = 60, 3.0 mW input power).
