Figure 3
From: Collapse on the line – how synthetic dimensions influence nonlinear effects
Band structure of the 2D mesh lattice. Due to the Floquet nature of the system, not only the Bloch momenta kx/y, but also the propagation constant θ are periodic within [−π; π]. (a) Passive band structure in absence of any phase modulation. (b) By applying a phase modulation φ0 = π/2alternating every time step, the Dirac cone at kx = ky = ±π opens up and a gap appears. The red circle on the upper band represents a selective excitation of a Gaussian wave packet in the center of the Brillouin Zone.
