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3-D schematic diagram of the modeled 1-D nano-grating structure consisting of gold nanowires on a GaAs substrate. t is the thickness of the wires and w is the wire width separated by nano-slits of width g. P = w + g is the structure period. Transverse-magnetic (TM) polarized light of wavelength λ0 = 875 nm is incident with an angle (α) from the top of the structure.
