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Plots of ℜ(u) for an SRR grating with SRR of inner and outer radii 0.3 and 0.4 and ligaments of thickness 0.06: (a) fields generated by a line source at Ω=1.50 (Ω0=1.50295); (b,c) detail of u at Ω=1.50 centred around x=49 showing the developed field; (d) field generated by a line source at Ω=1.42 (Ω0=1.42199); (e,f) detail of ℜ(u) at frequency Ω=1.42. (Online version in colour)
