Although our group is mainly concentrating on theory, in the person of Pavel Malý, we are (as a research group) entering the realm of experimental spectroscopy. By setting specific polarizations of the pump and probe pulses, combined with a polarizer behind the sample, the method proposed by Pavel Malý and Bart van Oort improves the signal-to-scatter by roughly the factor 5 against a simple experimental setup without the polariser. The paper appeared in Scientific Reports 7 (2017) 43484 and it is available for download free of charge (Scientific Reports is an Open Access journal of the Nature group).