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. 2016 May 20;7:11619. doi: 10.1038/ncomms11619

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(a) Simulated field pattern when metallic rods of a lattice ring gradually decrease their heights to zero (shown in the inset; from s₁ to s₇, s₁=4.7 mm, s₂=4.1 mm, s₃=3.5 mm, s₄=2.9 mm, s₅=2.3 mm, s₆=1.7 mm and s₇=1.0 mm). Metal is modelled as a perfect electric conductor in simulation. (b) Observed field pattern corresponding to simulation in a.