The optical spectra of molecules are often highly congested, making definite assignment of features and dynamics difficult. We use a polarization-based strategy for the decomposition of transient absorption (TA) signals. In this approach, the polarization-associated spectra (PAS) can be isolated to the contributions either parallel or orthogonal to the initially excited transition dipole moment (TDM) of the molecule. An analysis based on PAS

• Makes the interpretation of TA signals much easier or even possible.
• Retrieves the relative angle between different TDMs in the molecule, which is important structural information.