Shaping light like never before – with photonic time crystals: Experimental breakthrough unlocks ultrafast control of light in the #terahertz range Team from #l'X, #collègedefrance, and #HZDR has achieved a world first: the experimental realization of an all-optical #photonic time crystal. #PTC #TELBE Image: B. Schröder/HZDR ▶️ www.hzdr.de/presse/ptc