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Title: Broadband parametric amplifiers based on nonlinear kinetic inductance artificial transmission lines

Here, we present broadband parametric amplifiers based on the kinetic inductance of superconducting NbTiN thin films in an artificial (lumped-element) transmission line architecture. We demonstrate two amplifier designs implementing different phase matching techniques: periodic impedance loading and resonator phase shifters placed periodically along the transmission line. Our design offers several advantages over previous CPW-based amplifiers, including intrinsic 50 Ω characteristic impedance, natural suppression of higher pump harmonics, lower required pump power, and shorter total trace length. Experimental realizations of both versions of the amplifiers are demonstrated. In conclusion, with a transmission line length of 20 cm, we have achieved gains of 15 dB over several GHz of bandwidth.
 [1] ;  [2] ; ORCiD logo [3] ;  [4] ; ORCiD logo [5] ;  [5] ;  [5] ;  [5]
  1. Stanford Univ., CA (United States). Dept. of Physics
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Stanford Univ., CA (United States). Dept. of Physics; SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. Univ. of California, Santa Barbara, CA (United States). Dept. of Physics
  5. National Inst. of Standards and Technology (NIST), Boulder, CO (United States)
Publication Date:
Grant/Contract Number:
AC02-76SF00515; NNH12ZDA001N; NNX14AM48H
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 110; Journal Issue: 15; Journal ID: ISSN 0003-6951
American Institute of Physics (AIP)
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE; National Aeronautic and Space Administration (NASA)
Country of Publication:
United States
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 24 POWER TRANSMISSION AND DISTRIBUTION; Inductance; Capacitance; Optical amplifiers; Optical phase shifters; Broadband transmission
OSTI Identifier: