Fig. 3: Families of thresholdless topological solitons arising at different dimerization values γ. | Communications Physics

Fig. 3: Families of thresholdless topological solitons arising at different dimerization values γ.

From: Observation of nonlinear higher-order topological insulators with unconventional boundary truncations

Fig. 3: Families of thresholdless topological solitons arising at different dimerization values γ.The alternative text for this image may have been generated using AI.

Soliton power U versus propagation constant β, illustrating soliton families bifurcating from different linear localized modes: a the corner mode with n = 69 at γ = 0.6; b the edge mode with n = 70, which is located in the incomplete edge cell at γ = 0.6; c the edge mode with n = 75, which is located in the complete cell at γ = 1.6; and d the out-of-phase mode near the corner with n = 74 at γ = 1.6. The bottom line shows the intensity distributions ∣ψ∣2 corresponding to the points in the U(β) dependencies. Stable branches are shown with solid black lines, while unstable branches are shown with red dashed lines. Gray regions indicate bulk bands, and vertical gray dashed lines represent the eigenvalues of the linear modes.

Back to article page