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Resonant Transparency and Non-Trivial Non-Radiating Excitations in Toroidal Metamaterials

2013; Nature Portfolio; Volume: 3; Issue: 1 Linguagem: Inglês

10.1038/srep02967

2045-2322

V. A. Fedotov, A. V. Rogacheva, Vassili Savinov, Din Ping Tsai, Nikolay I. Zheludev,

Terahertz technology and applications

We demonstrate theoretically and confirm experimentally a new mechanism of resonant electromagnetic transparency, which yields extremely narrow isolated symmetric Lorentzian lines of full transmission in metamaterials. It exploits the long sought non-trivial non-radiating charge-current excitation based on toroidal dipole moment, predicted to generate waves of gauge-irreducible vector potential in the complete absence of scattered electromagnetic fields.