Despite the central role of light-matter interactions in many research fields - such as physics, chemistry, biology and medicine - the underlying mechnisms are often still undetermined. Many of the light-induced processes are ultrafast, i.e. proceed on a few-femtosecond timescale. This asks for spectrally tunable ultrafast light pulses of only a few optical cycles. Photoexcited species in nature show many distinct optical signatures spread from the ultraviolet to the infrared spectral region. So far, the desired combination of these versatile few-cycle light-pulses and broadband optical...