Long-wavelength infrared metamaterial absorber with polarization and angle insensitivity using compact hybrid cylindrical structures

, an experimental spectral averaged absorption of 92.7% is achieved over 8 to 14 μm, agreeing well with simulation. The absorber can be facilely fabricated by a standard photolithographic process, not requiring lengthy and costly e-beam lithography. The absorber is promising in IR signature suppression indicated by preliminary results. The structural compactness and excellent long wavelength infrared absorbing capability grant the presented absorber good potential in various applications, especially those requiring miniaturization, integration and low heat capacity.