Research data supporting ''Imaging the coherent propagation of collective modes in the excitonic insulator Ta2NiSe5 at room temperature''

Using a widefield pump-probe microscope (with ~10 nm spatial precision and ~10 fs time resolution) we probe the temperature and fluence dependent dynamics of the collective modes in excitonic insulator candidate Ta2NiSe5. We pump with a broadband pulse centered around 500 nm and probe ~800 nm using a bandpass filter.