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(Color online) Intensity distributions of the SPP nanodevices. (a) is a bare V-shape nanoslit in a piece of metal, where planes 1 and 2 are the integrated intensity planes for calculating the integrated transmission spectrum. (b) and (c) correspond to the transmission of nanoslit with structure B and both A and B. The inset shows the magnified detailed nanostructures. (d) shows the transmission spectra for a bare nanoslit, a slit with A, and a silt with A and B, respectively.
