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Title: Galvanically split superconducting microwave resonators for introducing internal voltage bias

We present the design and performance of high-Q superconducting niobium nitride microwave resonators intended for use in hybrid quantum systems, coupling spin degrees of freedom to the cavity mode, both magnetically and electrically. We demonstrate a solution that allows to introduce static electric fields in the resonator without compromising the microwave performance. Quality factors above 10{sup 5} remain unchanged in strong applied static electric fields above 10 MV/m and magnetic fields up to ∼400 mT. By design, the configuration of the dc field matches that of the microwave field, especially advantageous for experiments on electrostatically controlled spin systems.
Authors:
; ; ; ;  [1]
  1. Department of Microtechnology and Nanoscience, MC2, Chalmers University of Technology, SE-41296 Gothenburg (Sweden)
Publication Date:
OSTI Identifier:
22283278
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 5; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COUPLING; ELECTRIC FIELDS; ELECTRIC POTENTIAL; MAGNETIC FIELDS; MICROWAVE RADIATION; NIOBIUM NITRIDES; QUALITY FACTOR; SPIN; SUPERCONDUCTING CAVITY RESONATORS; SUPERCONDUCTIVITY; SUPERCONDUCTORS