Extended Data Fig. 3: Guiding of light by various topological vortices.
From: Topological steering of light by nematic vortices and analogy to cosmic strings
a-d, (left) Computer-simulated light trajectories (red lines) overlaid atop of corresponding n(r) (white cylinders) and (right) experimental light propagation trajectories of 1064 nm laser beams emerging from different entry points (cyan arrows with yellow frame). The studied vortices from (a) to (d) are defects with: (a) k = -1, Ψ0 = 0; (b) k = -1, Ψ0 = π/2; (c) k = -1/2, Ψ0 = 0 and (d) k = 1/2, Ψ0 = π/8, respectively. The simulated beam trajectories are obtained using the Hamiltonian approach of ray tracing (Methods). All scale bars are 100 μm.
