Discrete breathers in nonlinear magnetic metamaterials

Abstract

Magnetic metamaterials composed of split-ring resonators or $U-$type elements may exhibit discreteness effects in THz and optical frequencies due to weak coupling. We consider a model one-dimensional metamaterial formed by a discrete array of nonlinear split-ring resonators with each ring interacting with its nearest neighbours. On-site nonlinearity and weak coupling among the individual array elements result in the appearence of discrete breather excitations or intrinsic localized modes, both in the energy-conserved and the dissipative system. We analyze discrete single and multibreather excitations, as well as a special breather configuration forming a magnetization domain wall and investigate their mobility and the magnetic properties their presence induces in the system.

4 pages, 6 figures, Physical Review Letters, accepted

References in corpus (3)

• Magnetic metamaterials at telecommunication and visible frequencies
• Nonlinear properties of left-handed metamaterials
• Nonlinear magnetoinductive waves and domain walls in composite metamaterials

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