Surface Plasmon Resonance-based Ultra-broadband Solar Thermal Absorber Design Using Graphene Material

A three-layer type of solar absorber is developed with a graphene layer to observe a perfect absorption level in this work. The top (resonator) uses Iron (Fe), the middle (substrate) layer is Indium Antimonide (InSb), and the base (ground) layer with Aluminium (Al). The proposed design can perform the absorption percentages of 94.3% at the 2800 nm ultra-broadband bandwidth range. Absorption levels greater than 95% (96.6%) at a 1470 nm and a 750 nm bandwidth above 97% (98.1%). The contribution steps of the design and the respective absorption A, reflectance R, and transmittance T outputs are explored. AM performances and parameter variations of thickness and width of a base layer, resonator, and substrate thickness can be studied. Moreover, chemical potential and incidence angle changing from 0 to 60 degrees with a 10-degree separation are also presented. The comparison table and electric amount testing sections are also included in a recent paper.