High-frequency limit in the nonstationary Josephson effect
Akimenko A.I., Solov'ev V.S. , Yanson I.K.
The method of mixing two microwave signals in superconducting Nb-Nd point contacts is used to investigate the high-frequency limit in the nonstationary Josephson effect. It is found that generation up to 240 harmonics of a 70-GHz klystron signal is possible, corresponding to a frequency —17 THz.