High frequency parametric amplification based on the non-linear dynamics of superconductors

Saeed A. Khan, A. Metelmann, Hakan E. Türeci

Wei-Chen Chien, Yu‐Han Chang, Xinlu Cheng +4 more

Abstract Ultra-thin superconducting aluminum films of 3-nm grown on sapphire by molecule-beam epitaxy show excellent superconductivity and large kinetic inductance. This results in a record high Kerr non-linearity of 33 kHz and 3.62 MHz per photon in notch-type and transmission-type resonators, respectively. 4-wave mixing leverages this non-linearity to achieve 12 dB parametric amplification in transmission type resonator, making the ultra-thin film ideal for photon detection and amplification applications.

Srivats Rajasekaran, E. Casandruc, Yannis Laplace +5 more

R. A. Connell

Ch. Preis, Manas Sardar, J. Keller

The use of the intrinsic Josephson effect in layered high-Tc superconductors for parametric amplification of a signal in the presence of a strong pump radiation is investigated. Model calculations are performed both for thin films and massive material with a surface parallel to the c direction assuming normal incidence of the radiation with electric field parallel in c direction. In both cases a positive signal gain is obtained in a limited range of frequencies and pump power.

P. Bura