Polarization-Independent Near-Perfect Absorber in the Visible Regime Based on One-Dimensional Meta-Surface

Abstract

We present a polarization-independent near-perfect absorber in the visible regime based on one-dimensional meta-surface. In this absorber, the dielectric grating layer with high refractive index is essential, which supports strongly localized electromagnetic modes concentrated in the double-metal regions. The simulation results show that absorption peaks are over 99% at the wavelength of 0.45 μm for both TM and TE polarizations. The near-perfect absorptions are attributed to the lateral plasmon cavity resonance and longitudinal Fabry-Perot-like cavity resonance for TM and TE polarization, respectively. Furthermore, theses absorption peaks can maintain almost unchanged within wide ranges of incident and azimuthal angles. Comparing with those meta-material absorbers with complex two-dimensional array and one-dimensional stacked array, this one-dimensional absorber has a very simple geometrical structure which can be integrated into complex photonic devices expediently.