Metamaterial Particles for Electromagnetic Energy Harvesting

Applied Physics Letters (Impact Factor: 3.3). 10/2012; 101(17):173903. DOI: 10.1063/1.4764054


Metamaterials are typically made of an ensemble of electrically small resonators such as metallic loops. The fact that such particles resonate individually to generate a bulk material behavior having enhanced constitutive parameters is essentially indicative of these particles' ability to collect energy. We show that such particles act as energy collectors when a resistive load is inserted within the particle's gap. A proof of concept is provided using a 5.8 GHz field and a split-ring resonator (SRR) as the electromagnetic energy collecting cell. Numerical simulation for a 9 × 9 SRR array shows the effectiveness of an SRR array as an energy collector plate.

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    • "The meta-harvester unit cell dimensions (mm) a c d e g s w t 33.31 15 3.5 13.5 0.5 0.5 3 9.9 to one, and hence, becomes matched to the free space. A critical difference between a typical metamaterial absorber (meta-absorber) and a metamaterial harvester (metaharvester ) is that while in the first case the captured power mainly dissipates in the dielectric substrate and the metallic parts, in the second case, the captured power is mainly delivered to a properly placed load, which represents the input impedance of a rectification circuit [7] [8] [9] [10]. A typical structure of meta-harvesters can outperform a conventional rectification system [11] [12], which consists of an antenna and a rectifier (i.e. "
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