Vacuum Gap Microstrip Microwave Resonators for 2.5-D Integration in Quantum Computing
Rupert Lewis, Michael David Henry, Katlin M. Schroeder · IEEE Transactions on Applied Superconductivity · 2017
Vacuum gap λ/2 microwave resonators are demonstrated as a route toward higher integration in superconducting qubit circuits. The resonators are fabricated from pieces on two silicon chips bonded together with an In-Sb bond. Measurements of the devices yield resonant frequencies in good agreement with simulations. Creating low loss circuits in this geometry is also discussed.