Author(s): R. P. Erickson, M. R. Vissers, M. Sandberg, S. R. Jefferts, and D. P. Pappas
Superconducting niobium-titanium nitride resonators are used to generate multi-octave frequency combs in the microwave regime.
[Phys. Rev. Lett. 113, 187002] Published Thu Oct 30, 2014