Abstract
Manipulating electromagnetic response of materials provides a powerful means of controlling the interaction between light and matter. Negative refraction is one of the signature effects of metamaterial physics and its exciting demonstration became a frontier for material and electromagnetic research. The dramatic Physics exhibited by the metamaterial is underpinned by the resonant response of the metamolecules. A wide range of tunable THz resonance frequency provides a technological breakthrough in metamaterials. In the course of work, we show that magnetic terahertz spin wave response can be achieved in a kagome shaped unit cell composed of cobalt and iron magnetic resonant elements. The magnetization dynamics of the proposed system is numerically studied using mumax3. The six-fold rotational symmetry of the kagome lattice yields dipolar field-dependent magnetization. The field dependent magnetization obtained from numerical studies is used to investigate the negative refraction behavior.
Published Version
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