MXene resonator-based highly efficient ultrawideband absorber for thermal and solar absorber application

The design features MXene–SiO₂–Fe-based metasurfaces to enhance efficient absorption across a wide range of the solar spectrum. The proposed investigation of the absorber is essential for an efficient thermal energy harvesting solution and a broad frequency range of both infrared and visible light absorber architectures. The findings derived from computational and numerical analyses will assist in identifying optimal material geometries for effective wideband infrared and visible UV light absorbers and thermal harvesting structures. The entire structure is evaluated against interference theory-based calculations to ascertain effective absorption across the solar spectrum. The basic parameters, such as refractive index, permittivity, permeability, and impedance, were presented for the proposed structure to identify its metamaterial effect. This study introduced a double-multilayer structure of SiO₂ and Fe as the metamaterials. MXene is a resonator in the THz frequency range at an angle of incidence of 60° degrees, within the range of plasmonic insensitivity. The absorption capacity reaches > 90%, making the proposed structures suitable for harvesting solar energy. In addition, the simulated results show high thermal radiation and high thermal efficiency with increasing temperature, emphasizing the importance of simulating MXene as a resonator. The proposed structure can be crucial for designing highly efficient parasitic solar absorbers for multiple solar and thermal absorption applications.