The cover image represents laser light illuminating a densely‐spaced, randomly‐arranged, 3D‐network of a WS2 polymorph (“nanomesh”), where 2D sheets intersect and twist on top of each other, modifying the energy landscape of the material, as presented by Ventsislav K. Valev and co‐workers in article number 2100117. The multiphoton emission is dominated by large second harmonic generation (SHG) that is doubly resonant at the broad C spectral feature of the transition metal dichalcogenide.
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