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Schematic drawing of (a) sample setup, experimental procedure, and (b) the periodic surface pattern obtained.
DIC micrographs showing periodic PMMA surface patterns: (a) ripples, (b) rings, and (c) hillocks. The arrows are parallel to . The white scale bars denote .
Power loss densities of the optical field (a) in the PMMA and (b) in the Au according to RPM calculations. The PMMA surface and the PMMA-Au interface are located at and , respectively. The losses (INC), (SPP), and (INT) are due to the incident field, the SPP, and the interference between the incident wave and the SPP.
Stationary temperature field in the PMMA resulting from a heat conduction calculation assuming 1% coupling to the SPP and at the upper and lower boundary of the layer stack air (see Ref. 14). The air-PMMA interface is located at . The profile in air and in the substrate is not plotted.
[(a)–(d)] Series of KMC snapshots describing the thermocapillarity-induced ripple formation in a thin film. The color scale indicates the temperature in the film (dark = cold; light = hot). The black area illustrates the substrate. [(e) and (f)] KMC snapshots on the formation of hillock arrays.
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