Higgs spectroscopy in high-temperature superconductors

With Higgs spectroscopy, we have developed a new method for the investigation of quantum materials, especially high-temperature superconductors. For this purpose, we excite Higgs modes as collective oscillations of the superconducting condensate using Terahertz lasers. This allows direct experimental access to the dynamics of the superconductor and its couplings to external modes. In addition to new insights into high temperature superconductivity and the possibility of its optical control, Higgs spectroscopy as a new method can also be applied to condensates in other quantum materials.