Selected Publications
 

Broadband lumped-element Josephson parametric amplifier with single-step lithography

T. Elo, T. S. Abhilash, M. R. Perelshtein, I. Lilja, E. V. Korostylev, and P. J. Hakonen

We present a lumped-element Josephson parametric amplifier (JPA) fabricated using a straightforward e-beam lithography process. Our strongly coupled flux-pumped JPA achieves a gain of 20 dB with a bandwidth of 95 MHz around 5 GHz, while the center frequency is tunable by more than 1 GHz, with the additional possibility for rapid tuning by varying the pump frequency alone. Analytical calculations based on the input-output theory reproduce our measurement results closely.


Appl Phys Lett 114, 152601 (2019)

doi: 10.1063/1.5086091