92 citations · 136 across the 5 of their papers we have counts for
11 papers
Reducing strain in heterogeneous quantum devices using atomic layer deposition
Oscar W. Kennedy, James O'Sullivan, Christoph W. Zollitsch +3
We investigated the use of dielectric layers produced by atomic layer deposition (ALD) as an approach to strain mitigation in composite silicon/superconductor devices operating at…
Quantum engineering with hybrid magnonics systems and materials
D. D. Awschalom, C. H. R. Du, R. He +19
Quantum technology has made tremendous strides over the past two decades with remarkable advances in materials engineering, circuit design and dynamic operation. In particular, the…
Parity-controlled spin-wave excitations in synthetic antiferromagnets
A. Sud, Y. Koike, S. Iihama +3
We report in this study the current-induced-torque excitation of acoustic and optical modes in Ta/NiFe/Ru/NiFe/Ta synthetic antiferromagnet stacks grown on SiO2/Si substrates. The…
Spin resonance linewidths of bismuth donors in silicon coupled to planar microresonators
James O'Sullivan, Oscar W. Kennedy, Christoph W. Zollitsch +5
Ensembles of bismuth donor spins in silicon are promising storage elements for microwave quantum memories due to their long coherence times which exceed seconds. Operating an effic…
Tunable magnon-magnon coupling in synthetic antiferromagnets
A. Sud, C. W. Zollitsch, A. Kamimaki +5
In this work, we study magnon-magnon coupling in synthetic antiferromagnets (SyAFs) using microwave spectroscopy at room temperature. Two distinct spin-wave modes are clearly obser…
Tuning high-Q superconducting resonators by magnetic field reorientation
Christoph W. Zollitsch, James O'Sullivan, Oscar W. Kennedy +2
Superconducting resonators interfaced with paramagnetic spin ensembles are used to increase the sensitivity of electron spin resonance experiments and are key elements of microwave…