A universal design to realize a tunable perfect absorber from infrared to microwaves.
We propose a design for an universal absorber, characterized by a resonance frequency that can be tuned from visible to microwave frequencies independently of the choice of the metal and the dielectrics involved. An almost perfect absorption up to 99.8% is demonstrated at resonance for all polarization states of light and for a very wide angular aperture. These properties originate from a magnetic Fabry-Perot mode that is confined in a dielectric spacer of λ/100 thickness by a metamaterial layer and a mirror. An extraordinary large funneling through nano-slits explains how light can be trapped in the structure. Simple scaling laws can be used as a recipe to design ultra-thin perfect absorbers whatever the materials and the desired resonance wavelength, making our design truly universal.
Clermont Université, Université Blaise Pascal, Institut Pascal, BP 10448, F-63000 Clermont-Ferrand, France.|CNRS, UMR 6602, Institut Pascal, F-63177 Aubière, France.
Rafik
R
Smaali
Clermont Université, Université Blaise Pascal, Institut Pascal, BP 10448, F-63000 Clermont-Ferrand, France.|CNRS, UMR 6602, Institut Pascal, F-63177 Aubière, France.
Fatima
F
Omeis
Clermont Université, Université Blaise Pascal, Institut Pascal, BP 10448, F-63000 Clermont-Ferrand, France.|CNRS, UMR 6602, Institut Pascal, F-63177 Aubière, France.
Antoine
A
Moreau
Universitè Montpellier, IES, UMR 5214, F-34000, Montpellier, France.|CNRS, IES, UMR 5214, F-34000, Montpellier, France.
Thierry
T
Taliercio
Clermont Université, Université Blaise Pascal, Institut Pascal, BP 10448, F-63000 Clermont-Ferrand, France.|CNRS, UMR 6602, Institut Pascal, F-63177 Aubière, France.
Emmanuel
E
Centeno