Diamagnetism in wire medium metamaterials: theory and experiment

TL;DR

This paper demonstrates that wire medium metamaterials exhibit a significant diamagnetic response due to finite wire radius, challenging previous assumptions and emphasizing the importance of magnetic susceptibility in their effective medium description, supported by theory and experiments.

Contribution

It reveals the non-zero magnetic susceptibility in wire medium metamaterials with finite wire radius, providing a more accurate effective medium model.

Findings

Wire medium exhibits strong diamagnetism due to finite wire radius

Magnetic susceptibility must be included in effective medium models

Experimental results confirm theoretical and numerical predictions

Abstract

Strong diamagnetic response of wire medium with finite wire radius is reported. Contrary to the previous works where it was assumed that the wire medium exhibits only the electric response, we show that the non-zero magnetic susceptibility has to be taken into account for proper effective medium description of the wire medium. Analytical and numerical results are supported by the experimental measurements.