Study of surface plasmon polariton (SPP) dynamics with interferometric time-resolved photoemission electron microscopy (ITR-PEEM) Part 3:
Fig.3 Photoemission electron micrographs of a silver grating. (a) Conventional 1PP-PEEM using Hg-lamp as the excitation source. It shows the surface morphology similar to a scanning electron micrograph shown as an inset. (b) Localized surface plasmons pictured via 2PPE using 400-nm fs-laser as the excitation source. (c) 3-D plot of (b).
Figure 3 shows photoemission electron micrographs of a silver grating with 780-nm period. Localized surface plasmons (LSP) excited at nano-scale silver defects are imaged as thorn-like processes (Fig. 3 (b), (c)). It is quite a contrast to a surface morphology image taken by using a conventional Ha-lamp (Fig. 3 (a)).
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