Multiimensional Spectroscopy on the Microscale: Development of a Multimoal Imaging System Incorporating 2D White-Light Spectroscopy, Broaban Transient Absorption, an Atomic Force Microscopy

The ynamics of electronic transitions in soli-state materials are closely linke to microscopic morphology, but it is challenging to simultaneously characterize their spectral an temporal response with high spatial resolution. We present a time-resolve nonlinear microscopy system using white-light supercontinuum pulses as a broaban light source. This system is capable of correlating nanometer scale sample morphology etermine from atomic force topography measurements with broaban transient absorption hyperspectral images an ultrafast 2D white-light spectra, all with a spatial resolution of ≤1 μm. The experimental apparatus is escribe with a focus on the ispersion management strategies necessary to minimize the uration of optical pulses when implementing an AOM base pulse-shaping system covering a broa-spectral range in the VIS/NIR. Experiments on TIPS-pentacene organic semiconuctor microcrystals are use to emonstrate the unique capabilities of this technique.