Figure 2: Fabrication and optical response of a NOM metasurface.
From: Colloidal metasurfaces displaying near-ideal and tunable light absorbance in the infrared
(a) Image of the deposition process after Ag nanocube array assembly at an air–water interface. (b) Demonstration of metasurface fabrication onto a large-area, flexible elastomer substrate. (c) Scanning electron microscope image showing close-packed Ag nanocubes after deposition, with a measured spacing of 3 nm, which occur due to polymer grafts at the Ag surface. Scale bar=1.0 μm. (d–f) Reflectance, transmittance, and absorbance spectra of a close-packed NOM metasurface using Ag nanocubes with e=92 nm, with 98% absorbance at the fundamental resonance (blue curve). For comparison, spectra for an array of close-packed Ag nanocubes (red), and a bare Au thin film (black) are shown.
