KB Alici, AB Turhan, CM Soukoulis, and E Oz- Optics Express, 2011
We designed, fabricated, and experimentally characterized thin absorbers utilizing both electrical and magnetic impedance matching at the near-infrared regime. The absorbers consist of four main layers: a metal back plate, dielectric spacer, and two artificial layers. One of the artificial layers provides electrical resonance and the other one provides magnetic resonance yielding a polarization independent broadband perfect absorption. The structure response remains similar for the wide angle of incidence due to the sub-wavelength unit cell size of the constituting artificial layers. The design is useful for applications such as thermal photovoltaics, sensors, and camouflage. …The signal was measured by using a StellarNet Red Wave NIR spectrometer at the infrared regime (900 nm–1700 nm).
Fig. 5. Simulated absorption response of the SRR based metamaterial absorber for several incidence angles.
