A split-cavity design for the incorporation of a DC bias in a 3D microwave cavity
Martijn A. Cohen (TU Delft - QN/Steele Lab)
M. Yuan (TU Delft - QN/Steele Lab)
B.W.A. de Jong (Student TU Delft)
Ewout Beukers (Student TU Delft)
SJ Bosman (TU Delft - QN/Steele Lab)
Gary Alexander Steele (TU Delft - QN/Steele Lab)
More Info
expand_more
Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.
Abstract
We report on a technique for applying a DC bias in a 3D microwave cavity. We achieve this by isolating the two halves of the cavity with a dielectric and directly using them as DC electrodes. As a proof of concept, we embed a variable capacitance diode in the cavity and tune the resonant frequency with a DC voltage, demonstrating the incorporation of a DC bias into the 3D cavity with no measurable change in its quality factor at room temperature. We also characterize the architecture at millikelvin temperatures and show that the split cavity design maintains a quality factor Qi ∼ 8.8 × 105, making it promising for future quantum applications.
help_outline