title: Wide-angle, polarization-independent and dual-band infrared perfect absorber based on L-shaped metamaterial.
abstract: We propose a wide-angle, polarization-independent and dual-band infrared perfect metamaterial absorber made of double L-shaped gold patches on a dielectric spacer and opaque gold ground layer. Numerical and experimental results demonstrate that the absorber has two near-unity absorption peaks, which are result from magnetic polariton modes generated at two different resonant wavelengths. In addition, the proposed structure also shows good absorption stability in a wide range of incident anglesθfor both TE and TM incidences at azimuthal angle φ = 0°. Moreover, we demonstrate that such structure has good absorption stability for a wide range of azimuthal angles due to the excitation of perpendicular magnetic polariton modes within the asymmetric double L-shaped structure. Such structure will assist in designing magnetic polaritons absorbing element for infrared spectroscopy and imaging.
authors.forename: Yang
authors.initials: Y
authors.lastname: Bai
authors.forename: Li
authors.initials: L
authors.lastname: Zhao
authors.forename: Dongquan
authors.initials: D
authors.lastname: Ju
authors.forename: Yongyuan
authors.initials: Y
authors.lastname: Jiang
authors.forename: Linhua
authors.initials: L
authors.lastname: Liu