  Due to their unique optical properties, including stable and chiral excitons,
two-dimensional transition metal dichalcogenites hold the promise of
applications in nanophotonics. Chemical vapor deposition techniques offer a
platform to fabricate and design nanostructures with diverse geometries.
However, the more exotic the grown nanogeometry, the less is known about its
optical response. We have fabricated tungsten disulphide nanostructures with
geometries ranging from monolayers to dented pyramids. The dented pyramids
exhibit a strongly reduced photoluminescence with respect to horizontally
layered tungsten disulphide, facilitating the study of their clear Raman signal
in more detail. Excited resonantly, the dented pyramids exhibit a great number
of higher-order phononic resonances. In contrast to monolayers, the spectral
features of the optical response of the pyramids are position dependent.
Differences in peak intensity, peak ratio and spectral peak positions reveal
local variations in the atomic structure of the dented pyramids crater and
sides. We characterize the position-dependent optical response of dented
tungsten disulphide pyramids and attribute this to growth-induced nanogeometry.
Thereby we open the way for producing tunable nanophotonic devices with
applications ranging from opto-electronics to non-linear optics.
