Figure 2: Plasmonic colour filters.
From: Plasmonic nanoresonators for high-resolution colour filtering and spectral imaging
(a) Optical microscopy images of seven plasmonic colour filters illuminated by white light. Scale bar, 10 μm. (b) Experimentally measured transmission spectra of three fabricated colour filters corresponding to the RGB colours. The circle and triangle correspond to TM and TE illuminations respectively. (c) Scanning electron microscopy image of the pattern 'M' formed by two stack periods. The periods of the navy blue background and the yellow character are 220 and 310 nm, respectively. Scale bar, 3 μm. (d) Optical microscopy image of the pattern illuminated with white light.
