Complex 3D Vortex Lattice Formation by Phase-Engineered Multiple Beam Interference

Figure 4

Analysis of vortices in a 3D photonic lattice formation by 3 + 1 noncoplanar beam interference. (a) 3D intensity distribution. (b) Intensity distribution of 𝑥-𝑦 plane with a lower threshold value in order to highlight the darker regions alone. (c) Phase profile. (d) The fork formation while the pattern is interfered with a plane wave launched at a large angle from the axis. (e) Intensity mesh plot. (f) Zero crossing plot (blue line: zeros of Re𝐸(𝑟) and green line: zeros of Im𝐸(𝑟)).

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