Coherent three-dimensional spectroscopy is a new technique under development. In spectroscopy, experiments are usually carried out in the first dimension. Adding a second dimension offers a variety of advantages such as decreased spectral congestion, allowing one to observe the resolution of the peaks more clearly. Expansion to a third dimension should provide additional advantages such as selectivity, where spectra are generated for just one selected species in samples that are mixtures. This project is uniquely based on non-parametric four wave mixing, as opposed to the previously used parametric four wave mixing processes, and is being used for the first time to select a single isotopologue from mixtures.
