Figure 1
From: Fabry-Perot cavity resonance enabling highly polarization-sensitive double-layer gold grating
(a) Schematic illustration of the double-layer Au grating composed of the dielectric spacer situated between identical Au gratings. Here, p is the Au grating periodicity (1 μm), w is the Au grating width (0.7 μm), tAu is the metal thickness (0.1 μm), and tBCB is the BCB thickness (0.25 μm) between the gratings. (b) Tilted-view and (c) cross-sectional-view scanning electron microscope (SEM) images of the double-layer Au grating.
