 It has already been use for the characterization of graphene layers, J-aggregated dyes inside carbon nanotubes and multiple other 2D materials such as MoS2 and WSe2.Since the excitation beam is dispersed over the whole field of view, those measurements can be done without damaging the sample.The most common approach is "hyperspectral imaging" or "chemical imaging", in which thousands of Raman spectra are acquired from all over the field of view by, for example, raster scanning of a focused laser beam through a sample.