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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
Discrete breathers in nonlinear magnetic metamaterials
N Lazarides1, M Eleftheriou, G P Tsironis
1Department of Physics, University of Crete, and Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, P. O. Box 2208, 71003 Heraklion, Greece.
Physical Review Letters
|December 13, 2006
Summary
Magnetic metamaterials with nonlinear split-ring resonators can host localized energy modes. These discrete breathers and domain walls influence the material's magnetic properties and mobility.
Area of Science:
- Condensed Matter Physics
- Metamaterials Science
- Nonlinear Dynamics
Background:
- Magnetic metamaterials, particularly those with split-ring resonators (SRRs) or U-type elements, can exhibit discreteness effects at terahertz (THz) and optical frequencies.
- These effects arise from weak inter-element coupling in discrete arrays, influencing wave propagation and energy localization.
Purpose of the Study:
- To investigate the emergence and properties of discrete breather excitations in a one-dimensional array of nonlinear magnetic metamaterial elements.
- To analyze the behavior of single and multibreather excitations, including a specific magnetization domain wall configuration.
- To explore the mobility of these localized modes and their impact on the system's magnetic properties.
Main Methods:
- Modeling a one-dimensional metamaterial array of nonlinear split-ring resonators with nearest-neighbor interactions.
- Analyzing the system's dynamics in both energy-conserved and dissipative regimes.
- Investigating discrete breather excitations, including single, multi-breather, and domain wall configurations.
- Studying the mobility and induced magnetic properties of these localized modes.
Main Results:
- Discrete breather excitations and intrinsic localized modes appear due to on-site nonlinearity and weak coupling.
- Analysis covers single and multibreather configurations, as well as a magnetization domain wall breather.
- The study investigates the mobility of these localized modes and their induced magnetic properties.
Conclusions:
- Nonlinear magnetic metamaterials support discrete breather excitations and localized modes.
- These localized modes, including domain wall configurations, exhibit mobility and modify the system's magnetic characteristics.
- The findings are relevant for understanding energy transport and magnetic phenomena in discrete metamaterial systems.
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