High quality factor, fully switchable THz superconducting metasurface for cavity QED applications

Metamaterials proved in the last 15 years to be an extremely flexible and useful concept that has been implemented in many different contexts, from fundamental research to applications . We present a complementary metasurface realised with Niobium thin film which displays a quality factor Q= 54 (see Fig. 1 (a)) at 266 GHz and a fully switchable behaviour as a function of the temperature. The switching behaviour and the high quality factor are due to a careful design of the metasurface aimed at maximising the ohmic ...