Journal
APPLIED PHYSICS LETTERS
Volume 96, Issue 9, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3304168
Keywords
capacitors; gravimeters; inductors; microwave circuits; superconducting resonators
Categories
Funding
- NIST
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We have produced high-quality complex microwave circuits, such as multiplexed resonators and superconducting phase qubits, using a vacuum-gap technology that eliminates lossy dielectric materials. We have improved our design and fabrication strategy beyond our earlier work, leading to increased yield, enabling the realization of these complex circuits. We incorporate both novel vacuum-gap wiring crossovers for gradiometric inductors and vacuum-gap capacitors (VGC) on chip to produce resonant circuits that have large internal quality factors (30 000 < Q(I)< 165 000) at 50 mK, outperforming most dielectric-filled devices. Resonators with VGCs as large as 180 pF confirm single mode behavior of our lumped-element components.
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