Fig. 3: Experimental (top two rows) and numerical (bottom two rows) demonstrations of topologically controlled THz confinement in the LN chip from L-LD, through equidistant, to S-SD regions of the wedge-shaped SSH photonic lattice.
From: Topologically tuned terahertz confinement in a nonlinear photonic chip
a–e correspond to locations (A–E) marked in Fig. 1b. a1–e1 Measured spectra at the corresponding positions. a2–e2 Energy distribution of the modes showing different confinement of the generated THz waves in the LN chip. a3–e3 Simulated x−t diagrams showing the THz waves evolution in different regions, where a4–e4 are the corresponding spectra. The lattice sites are illustrated by white tick marks in a3–e3, and a in (a1, a4) is the lattice constant for the corresponding L-LD structure
