Ultra‐Broadband Wide‐Angle Polarization‐Independent Enhanced Absorber with Ultraviolet to Far‐Infrared Absorption Performance

Ultra‐thin broadband metamaterial absorbers exhibit high absorptivity and broad bandwidths. Herein, an ultra‐broadband wide‐angle polarization‐independent enhanced absorber with a metal–insulator–metal (MIM) structure is proposed and simulated. The enhanced absorber exhibits ultra‐wideband characteristics from ultraviolet to far‐infrared range (0.35–10 μm), where it achieves an average absorption > 96%. It is insensitive to variations in the polarization state, exhibits a wide‐angle absorption because of a high degree of geometric symmetry, and shows a satisfactory absorption performance for a combination of different materials. Thus, the distinct structural characteristics of the device play a pivotal role in absorption. These advantages improve the flexibility of material selection in the design and manufacturing process of ultra‐broadband enhanced absorbers, thereby broadening their application potential in solar energy harvesting, infrared detectors, and thermal imaging.