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AFM images of the nanodot structures on various substrates. (a) Glass, (b) silver film, and (c) gold film. Scan areas are . The two-dimensional Fourier transformation pattern is also shown as inset in each case towards the upper-right corner.
Schematic diagram of the optical setup for SPP excitation.
Dependence of total reflected light intensity on the angle of incidence along with the CCD camera images. (a) Without the nanodot array on the gold film and (b) with the nanodot array. (c) Profiles along the horizontal direction at the center of (a) and (b). The broken line represents the case of (a) and the solid line represents that of (b).
Calculated results of the variation of the ratio of the intensity for exciting SPP at the gold film surface to the incident light intensity with the angle of incidence. The broken line specifies the case without the nanodot array and the solid line specifies the reverse case.
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