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SEM micrographs of a silver nanoslit array structure formed on a mesa-etched quartz substrate: The effects of annealing (at in a vacuum for ) on the morphology of metal. (a) Side view of an as-deposited sample. (b) Top view of an as-deposited sample. (c) Side view of an anneal-treated sample. (d) Top view of an anneal-treated sample. The scale bar is .
Transmission spectra of a silver nanoslit array structure shown in Fig. 1: As deposited (solid curve), and after anneal treatment in vacuum (dashed curve).
Surface plasmon band structure calculated for a 1D silver nanoslit array structure with grating period of : Slit width of (solid curve) and (dashed curve). The inset shows a magnified view of the band-gap opening around wavelength.
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