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Tunable Epsilon Near Zero Metamaterial with Rotating Obround-Shaped Meta-Atoms

Published 4 Jun 2025 in physics.optics, physics.app-ph, and physics.plasm-ph | (2506.04428v1)

Abstract: A new design of a microwave-range ENZ metamaterial consisting of rods with an obround cross-section is proposed. The plasma frequency of the metamaterial can be tuned by rotating the constituent meta-atoms. Tunability of the plasma frequency by 26% is demonstrated both experimentally and numerically. The observed tuning range is dramatically higher than in the one observed in natural materials at optical range.

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