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Article Dans Une Revue Applied Physics Letters Année : 2014

Bandwidth enhancement in disordered metamaterial absorbers

Résumé

In this letter, we show numerically and experimentally that a positional disorder of a collection of absorbing electromagnetic wave resonators operating in the long wavelength regime dramatically enhances the absorption bandwidth. The demonstration is performed by using single-size ring-shaped thin metal pieces periodically or randomly positioned onto a back-grounded dielectric layer. For periodic array, an optimum in the periodicity is pointed out with a narrow bandwidth, while the increasing influence of coupling effects for resonators in close vicinity explains a three-fold bandwidth enhancement in the case of positional disorder.
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hal-01058509 , version 1 (27-05-2022)

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Jianping Hao, Eric Lheurette, Ludovic Burgnies, Etienne Okada, Didier Lippens. Bandwidth enhancement in disordered metamaterial absorbers. Applied Physics Letters, 2014, 105, 081102, 5 p. ⟨10.1063/1.4894181⟩. ⟨hal-01058509⟩
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