Broadband absorber using ultra-thin plasmonic metamaterials nanostructure in the visible and near-infrared regions

In this work, an ultra-thin plasmonic metamaterial nanostructure absorber is simulated using the finite difference time domain method in visible and near-infrared regions. A periodic square titanium-silica cap coated with glass medium mounted on top of a silver substrate. The presence host enhances absorption bandwidth by 276%. With almost perfect metal–insulator-metal absorber, over 90% absorbance has been obtained for wavelengths from 440 to 1850 nm, producing 1410 nm. impact changing dimensions different materials spectra investigated both regimes. considered metals layer are titanium, nickel, silver, aluminum, gold; however, insulators silica, quartz, vanadium dioxide, methyl methacrylate, aluminum dioxide. addition, copper, gold then as optimum structure, which produces maximum bandwidth, higher absorption, 90%, Glass-Ti–SiO2–Ag. finding illustrates that Ti–SiO2 cab base unit cell substrate 250 nm 200 respectively. Finally, calculated polarization angles ranges 10° 70° step10°.