Cone-shaped resonator-based highly efficient broadband metamaterial absorber

• Published in: Optical and quantum electronics 2023-07, Vol.55 (7), Article 579
• Main Authors: Kumar, Raj, Singh, Bipin K., Pandey, Praveen C.
• Format: Article
• Language: English
• Subjects: Absorbers; Absorbers (materials); Absorption spectra; Air masses; Broadband; Characterization and Evaluation of Materials; Circuits; Computer Communication Networks; Electrical Engineering; Impedance; Incidence angle; Lasers; Maximum power; Metamaterials; Nickel; Noble metals; Open circuit voltage; Optical Devices; Optics; Photonics; Photovoltaic cells; Physics; Physics and Astronomy; Resonators; Short circuit currents; Silicon dioxide; System effectiveness; Transverse electric modes
• ISSN: 0306-8919; 1572-817X
• DOI: 10.1007/s11082-023-04865-y

We propose a highly efficient, low-cost metamaterial absorber of nickel (Ni) metal-based cone-shaped resonators with a silicon dioxide dielectric layer (SiO 2 ). The proposed absorber exhibits an average absorption of 97% for the transverse magnetic and transverse electric modes over the visible region simulated by CST software. The nickel-metal impedance coincides with the impedance of free space and makes the proposed design an effective broadband absorber in the visible region. The average absorption with different incidence angles obtains over 90%, showing the polarization angles’ independence. The average absorption spectra are also examined for the absorber with different noble metals. In addition, short-circuit current densities ( J sc ) are calculated at different incidence angles for both modes under a global air mass of 1.5 (AM1.5). We have also plotted the  J–V  curve to obtain the values of the open-circuit voltage ( V oc ), Fill Factor, and conversion efficiency ( η ), whose values are 0.563 V, 81.86, and 11.68%, respectively. The proposed metamaterial absorber can be utilized to develop more reliable, highly efficient, cost-effective, and maximum-power extraction photovoltaic systems.