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Interference theory of metamaterial perfect absorbers

Chen, Hou-Tong

Optics express, 2012-03, Vol.20 (7), p.7165-7172 [Periódico revisado por pares]

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Título:
Interference theory of metamaterial perfect absorbers
Autor: Chen, Hou-Tong
Assuntos: Absorption ; Computer Simulation ; Light ; Manufactured Materials ; Models, Theoretical ; Refractometry - methods ; Scattering, Radiation
É parte de: Optics express, 2012-03, Vol.20 (7), p.7165-7172
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: 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.
Editor: United States
Idioma: Inglês

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