Fig. 1 | Nature Communications

Fig. 1

From: Ultra-confined surface phonon polaritons in molecular layers of van der Waals dielectrics

Fig. 1

Highly confined polaritons at the three-layer interface. a Schematics of the experiment. b, c Tabulated plots of the factors α (b) and Re(L) (c) defined in Eq. (1). White dotted line in image (b) represents the span of parameters used in the experiment; pink dotted lines and corresponding numbers highlight values of the parameter α. d Tabulated plot of the figure of merit for polariton propagation losses. Solid white curve depicts a set of the figure of merit local maximums upon varying the permittivity of the substrate and the dielectric

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