Fig. 2: Experimental samples of topological polaritonic metasurfaces. | Nature Communications

Fig. 2: Experimental samples of topological polaritonic metasurfaces.

From: Experimental observation of topological Z2 exciton-polaritons in transition metal dichalcogenide monolayers

Fig. 2

a SEM images of topological photonic metasurface with unit cells of trivial and topological domains indicated by hexagons and the domain wall shown by the armchair shaped black line. Optical microscope images of the two topological polaritonic metasurface samples (black) with TMD monolayers (orange) and hexagonal boron nitride (hBN) spacers (green, crimson). b MoSe2 monolayer transferred directly onto the metasurface and covered with a 12 nm hBN flake. c WSe2 monolayer incapsulated by 10 nm (bottom) and 30 nm (top) hBN flakes on top of another metasurface.

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