Expérimental
Strong light-matter interactions between quantum materials and the vacuum field of cavities at TeraHertz (THz) frequencies is emerging as a new frontier for the control of material properties. Among quantum materials, superconductors (SC) hold a special place and a timely question has arisen regarding the possibility to tune their spectacular properties by dressing their collective modes with THz cavity photons. In this internship, we propose to study the collective modes of NbSe2, an exotic SC exhibiting simultaneously SC and a charge density-wave (CDW) state. Of particular interest will be to investigate the dynamics of its Higgs-mode, an analogue of the Higgs-boson in SCs, and its interaction with the CDW mode. This will be achieved with a combination of equilibrium THz time-domain spectroscopy and pump-probe THz spectroscopy. The first steps towards integration of this SC inside THz cavities and the dressing of its collective modes will carried out. The consortium of this collaborative project also includes experts in Raman spectroscopy and the theory of condensed-matter and SCs.