Novel metamaterial absorber with fractal elements

Thin and versatile metamaterial absorbers have been employed for many applications from microwave to optical frequencies. Typical metamaterial characteristics are extremely sensitive to variations of the incident-angle and polarization. Previously, split-ring resonator (SRR) element metasurfaces and absorbers were shown with improved incident-angle-independent characteristics for vertical polarization only. In this paper, further improved absorber performances are presented for the geometrically symmetric fractal element.