Plasmonic metasurface with quadrilateral truncated cones for visible perfect absorber

Abstract

Solar radiation is mainly concentrated in the visible and infrared spectra ranges, and its perfect absorption has great significance to solar cell, energy harvester, emitter, perfect stealth, and hot-electron device fields. In this study, we theoretically design and numerically demonstrate a highly efficient broadband visible perfect absorber (VPA) using plasmonic metasurface , which consists of quadrilateral truncated cones configuration. The electromagnetic properties of VPA are discussed by changing the geometrical parameters, especially to the absorption intensity of VPA. VPA processes perfect absorption (100%) at the wavelength of 490 nm and the minimum absorption is 99.51% at the wavelength of 772 nm. The averaged absorption is 99.91% spanned the whole visible spectrum. The excellent absorption performance is revealed by the Fabry-Perot resonance, localized surface plasmon resonance (SPR), and propagating SPR . VPA exhibits ultrahigh absorption, wide incident angle, and polarization-independent characteristics. It proves that the designed VPA has great potential in thermal photovoltaics and energy harvesting applications. • A highly efficient broadband visible perfect absorber (VPA) using plasmonic metasurface is presented. • VPA processes perfect absorption (100%) at the wavelength of 490 nm. • The average absorption is 99.91% spanned the whole visible spectrum. • The averaged absorption intensities are 99.91%, 99.8%, and 94.7% at the incident angles of 0°, 20°, and 60°, respectively. • VPA exhibits ultrahigh absorption, wide incident angle, and polarization-independent characteristics.