THz/mid-IR radiation: Requirements at EuXFEL. Broadband, single-cycle THz pulses. Narrowband, multiple-cycle THz pulses. Large THz pulse energies supporting high-field (E and B) THz radiation. THz/mid-IR spectral range from 0.1 THz to 30 TH. zTunable THz central frequency. CEP-stable THz light pulses. Variable THz polarization. Synchronization of the THz/mid-IR and X-ray pulses.
