a photoexcited broadband absorption based on au nano cross elliptical disks structure with polarization-insensitive and wide-angle for visible light

We present the design and numerical simulations of a polarization-insensitive and wide-angle photoexcited broadband metamaterial absorption in the visible region base on au nano cross elliptical disks structure. the au nano cross elliptical disks structure comprises a periodic array of metal-dielectric multilayered structure and a no transmission metallic functional layer on the bottom. utilizing 3d finite difference time domain (fdtd) algorithm, the hybrid surface plasmon and the polarization-insensitive absorption of above 90 % for a wide range of incident angles of 40° are observed in the whole visible light (3.8–7.8 × 1014 hz).