Ultra-broadband perfect solar energy absorber based on tungsten ring arrays

Metamaterials play a crucial role in the research of broadband absorbers. In order to achieve broadband and efficient absorption of solar energy, a novel solar energy absorber based on tungsten ring array is proposed in this paper. The results of numerical analysis show that the absorption efficiency of the absorber is over 90% at 300 similar to 2000 nm, the average absorption efficiency is 96.2%, and the absorption peak is 99.9%. Broadband absorption can be attributed to the excitation of plasmon and Fabry-Perot resonance effect on the surface of metal-insulator-metal. In addition, thanks to the high symmetry of the structure, it is relatively independent of incident angle and polarization angle. In the future, the absorbent will have a promising application prospect in the fields of solar energy utilization, photothermal conversion and infrared detection.

Automated summary

The novel solar energy absorber based on tungsten ring array proposed in this paper demonstrates excellent broadband and efficient absorption performance in the wavelength range of 300 to 2000 nm, with an absorption efficiency of over 90%. Broadband absorption is achieved through the excitation of surface plasmons and Fabry-Perot resonance effect, and due to the high symmetry of the structure, it is relatively independent of incident angle and polarization angle. This absorber shows promising application prospects in the fields of solar energy utilization, photothermal conversion, and infrared detection.