Fig. 2 | npj 2D Materials and Applications

Fig. 2

From: Laterally confined photonic crystal surface emitting laser incorporating monolayer tungsten disulfide

Fig. 2

Experimental realization of the WS2 PCSEL. a SEM image of a fabricated Si3N4 cavity without WS2 (scale bar: 5 μm). The dashed lines separate PhC regions with different air hole radii. b Measured passive cavity resonance before transferring the monolayer WS2 flake. c Microscopy image of a WS2 flake transferred onto the Si3N4 PhC cavity (scale bar: 50 μm). d Measured PL spectra at 4.0 kW/cm2 pump power density

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