2 citations · 7 across the 4 of their papers we have counts for
5 papers
Simple coplanar waveguide resonator mask targeting metal-substrate interface
Cameron J. Kopas, Ella Lachman, Corey Rae H. McRae +4
This white paper presents a single-layer mask, found at https://github.com/Boulder-Cryogenic-Quantum-Testbed/simple-resonator-mask. It is designed for fabrication of superconductin…
Multi-modal electron microscopy study on decoherence sources and their stability in Nb based superconducting qubit
Jin-Su Oh, Xiaotian Fang, Tae-Hoon Kim +14
Niobium is commonly used for superconducting quantum systems as readout resonators, capacitors, and interconnects. The coherence time of the superconducting qubits is mainly limite…
Ge thin-films with tantalum diffusion-barriers for use in Nb-based superconductor technology
C. Kopas, S. Zhang, J. Gonzales +4
Germanium thin films are an excellent candidate for use as a low-loss dielectric in superconducting microwave resonators, a low-loss inter-layer metal wiring dielectric, and passiv…
Characterization of the Chemical and Electrical Properties of Defects at the Niobium-Silicon Interface
Cameron Kopas, Madhu Krishna Murthy, Christopher Gregory +4
The nature and concentration of defects near niobium-silicon interfaces prepared with different silicon surface treatments were characterized using current-voltage (I-V), deep leve…
Low microwave loss in deposited Si and Ge thin-film dielectrics at single-photon power and low temperatures
Cameron J. Kopas, Justin Gonzales, Shengke Zhang +5
Our study shows that deposited Ge and Si dielectric thin-films can exhibit low microwave losses at near single-photon powers and sub-Kelvin temperatures (40 mK). This low…