Extended Data Fig. 8: Intensity profile dependence on propagation distance and twist direction.
From: Twisted optical fibres as photonic topological insulators
a, Clockwise intensity profile (shown over 5 mm) when an initial excitation contains exclusively topological \({\mathcal{C}}=-1\) modes with a positive twist rate (837 rad/m). b, Anti-clockwise intensity profile (shown over 5 mm) when an initial excitation contains exclusively topological \({\mathcal{C}}=-1\) modes but the fibre is modeled with a negative twist rate (-837 rad/m). Both sets of intensity profiles are calculated using our tight-binding numerical model.
