Zusammenfassung

Metallic coplanar microwave resonators are widely employed at room temperature, but their low-temperature performance has received little attention so far. We characterize compact copper coplanar resonators with multiple modes from 2.5 to 20 GHz at temperatures as low as 5 K. We investigate the influence of center conductor width (20–100 µ m) and coupling gap size (10–50 µ m), and we observe a strong increase of quality factor ( Q ) for wider center conductors, reaching values up to 470. The magnetic-field dependence of the resonators is weak, with a maximum change in Q of 3.5% for an applied field of 7 T. This makes these metallic resonators well suitable for magnetic resonance studies, as we document with electron spin resonance (ESR) measurements at multiple resonance frequencies.

Links und Ressourcen

DOI:
10.1088/0022-3727/49/39/395501
URL:
BibTeX-Schlüssel:
0022-3727-49-39-395501
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