Spatial Modulation of Vibrational and Luminescence Properties of Monolayer MoS₂ Using a GaAs Nanowire Array

The integration of transition-metal dichalcogenides (TMDs) with non-planar substrates such as nanopillars provides a way to spatially modify the optical properties mainly through localized strain. Similar studies date have utilized insulating SiO 2 nanopillars. Here, we combine monolayer MoS free standing GaAs nanowires (NWs), in views coupling their semiconducting properties. We find that exhibits three different configurations: pierced, wrapped and tent-like. demonstrate how identify configurations by microscopy elucidate impact on vibrational luminescence characteristics confocal spectroscopy mapping. In particular, highlight increase intensity shift due photonic dielectric screening associated NW. This work signifies first step towards use vertical III-V NW arrays versatile platform for engineering TMDs.