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Title: Frequency-tunable high- Q superconducting resonators via wireless control of nonlinear kinetic inductance

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.5098466· OSTI ID:1613220

Frequency-tunable microwave resonators are in great demand especially in hybrid systems where precise frequency alignment of resonances is required. Here, we present frequency-tunable high-Q superconducting resonators fabricated from thin niobium nitride and niobium titanium nitride films. The resonant frequency is tuned by applying a magnetic field perpendicular to the hole structures in the resonator's inductor wire, whose kinetic inductance is modified by wirelessly induced DC supercurrents. A continuous in situ frequency tuning of over 300 MHz is achieved for a 10 GHz resonator with a moderate magnetic field of 1.2 mT. The planar resonator design and the noncontact tuning scheme greatly ease the fabrication complexity and can be widely applied in many hybrid systems for coupling microwave modes with other forms of excitations such as optical photons, phonons, magnons, and spins.

Research Organization:
Yale Univ., New Haven, CT (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0019406
OSTI ID:
1613220
Journal Information:
Applied Physics Letters, Vol. 114, Issue 19; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 20 works
Citation information provided by
Web of Science

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Cited By (3)

Tuning high-Q superconducting resonators by magnetic field reorientation journal December 2019
A tunable superconducting LC-resonator with a variable superconducting electrode capacitor bank for application in wireless power transfer journal November 2019
Radiative cooling of a superconducting resonator text January 2019

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