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Optical properties of AgPt and Pt NPs fabricated with the Ag7.5nm/Pt3.75nm bilayers. (a–a-3) Extinction and normalized extinction spectra. (b, b-1) Reflectance and normalized reflectance spectra, respectively. (c–c-2) Transmittance and normalized transmittance spectra. (d) AFM image of the typical Pt NP selected for the finite difference time domain (FDTD) simulations. (e, f) E-field distributions of NPs in xy plane (top view) and xz plane (side view).
