Interference theory of metamaterial perfect absorbers.

By Houtong Chen. Optics Express, 2011

838 citations recorded by the source corpus.

The impedance matching to free space in metamaterial perfect absorbers has been believed to involve and rely on magnetic resonant response, with direct evidence provided by the anti-parallel surface currents in the metal structures. Here I present a different theoretical interpretation based on interference, which shows that the two layers of metal structures in metamaterial absorbers are linked only by multiple reflections with negligible near-field interactions or magnetic resonances. This is further supported by the out-of-phase surface currents derived at the interfaces of resonator array and ground plane through multiple reflections and superpositions. The theory developed here explains all features observed in narrowband metamaterial absorbers and therefore provides a profound understanding of the underlying physics.

Subfields: Aerospace Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/019b06b0cc72882c2a5ce2a1750a665cfc8f55fd

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In Aerospace Engineering

In Electronic, Optical and Magnetic Materials

Citations in the corpus

Thin perfect absorbers for electromagnetic waves: Theory, design, and realizations (2015, background): “[51,63], it is claimed that a magnetic response is not necessary to realize metamaterial-based absorbers.”
Ultrawideband and High-Efficiency Linear Polarization Converter Based on Double V-Shaped Metasurface (2015, methodology): “To show this, we further study the polarization conversion characteristics using interference theory, as presented in [30],”
A review of metasurfaces: physics and applications (2016, background): “zero at several individual frequencies where the destructive interference conditions [56, 82] are largely satisfied, as illustrated in figure 11(c) and (d), in which the superposition seems to be responsible for the observed broadband performance.”
A Circuit-Based Model for the Interpretation of Perfect Metamaterial Absorbers (2012, background): “The latter configuration is instead frequently referred to as Perfect Metamaterial Absorber [17] and it is usually explained by recurring to complex effective medium parameters and even if more classical theories based on multiple reflections interactions have been recently explored to explain the p”