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(a) Dependency on the extinction spectra and reflection colors as a function of spacer thickness (from 5 to 50 nm) of the NHoM structure by FDTD calculations. (b) Transition in chromaticity coordinates of reflection colors as the Ag diameter of the NHoM structure changes. (c) Relationship between peak wavelength of short and long branches and Al2O3 spacer layer thickness from 5 to 50 nm. (d) Color palette of the spectra obtained for the NHoM structure with diameters from 30 to 90 nm.
