Depending on your pump-pulse duration, our spintronic terahertz source can generate ultrabroadband terahertz pulses with varying bandwidth. Below, you can find some exemplary spectra that might serve as an estimate for the achievable terahertz bandwith. The presented spectra refer to the terahertz electric field in the detection focus, that is, after refocussing the emitted terahertz beam. For the corresponding propagation function from the spintronic terahertz emitter to the detection focus position, a typical function linear in frequency is assumed. The respective pulse duration refers to the full width at half maximum of a pump pulse with a Gaussian intensity profile.