Abstract
We discuss the limitation of metallic wire structures as absorbers of high intensity electromagnetic radiation due to the large local electrical fields developed at junctions and free ends of the wires. We find that at resonance the breakdown external electric field applied to the body of the wire structure is smaller by several orders of magnitude than the dielectric breakdown field induced at the ends of the wire. We consider the double split ring structure and find that it can offer an enhancement of the Ohmic power absorbed by an order of magnitude over those of single component systems. For multiple connected wire structures we find classes of resonant modes with zero local fields at the junctions but the fields at the free wire ends remain finite.
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