In-situ profiling of pressure-induced exciton traps in suspended MoS$_2$ monolayers

We demonstrate the in-situ read-out of the spatial profile of suspended MoS$_2$ monolayers hosted on substrates with nano-structured holes. As the profiles are spatially bent, the suspended MoS$_2$ monolayers act as exciton traps with tunable luminescence intensity and energy. The tunability is realized by controlling the environmental pressure on the monolayers, which allows to control hundreds of suspended MoS$_2$ monolayers on a single substrate. The in-situ read-out is based on Fabry-Pérot interferences and a model of the corresponding reflectance contrast maps of the investigated monolayers.