Figure 1: Polarization-dependent light absorbers based on metallic gratings and trapezoid arrays. | Nature Communications

Figure 1: Polarization-dependent light absorbers based on metallic gratings and trapezoid arrays.

From: Broadband polarization-independent resonant light absorption using ultrathin plasmonic super absorbers

Figure 1

(a) Schematic representation of a three-layer MIM system with the top layer patterned as metallic gratings of width w. (b) Schematic representation of trapezoid array. (c) SEM images of metallic gratings with w=60 and 120 nm, and trapezoid arrays. Scale bar is 500 nm. (d) Schematic representation of the unit cell of a single trapezoid, width varying from 40 nm to 120 nm over 300 nm. (e) Measured extinction spectrum for the 60 nm and 120 nm wire gratings and trapezoid arrays for TM polarization (inset). (f) Measured extinction spectrum for TE polarization (inset). (g,h) Simulated extinction spectrum for TM and TE polarizations.

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