Spin–phonon interactions in silicon carbide addressed by Gaussian acoustics
By S. Whiteley, G. Wolfowicz, Christopher P. Anderson, A. Bourassa, He Ma, M. Ye, G. Koolstra, K. Satzinger, M. Holt, F. Heremans and 4 more. Nature Physics, 2018
249 citations recorded by the source corpus.
Hybrid spin–mechanical systems provide a platform for integrating quantum registers and transducers. Efficient creation and control of such systems require a comprehensive understanding of the individual spin and mechanical components as well as their mutual interactions. Point defects in silicon carbide (SiC) offer long-lived, optically addressable spin registers in a wafer-scale material with low acoustic losses, making them natural candidates for integration with high-quality-factor mechanical resonators. Here, we show Gaussian focusing of a surface acoustic wave in SiC, characterized using a stroboscopic X-ray diffraction imaging technique, which delivers direct, strain amplitude information at nanoscale spatial resolution. Using ab initio calculations, we provide a more complete picture of spin–strain coupling for various defects in SiC with C3v symmetry. This reveals the importance of shear strain for future device engineering and enhanced spin–mechanical coupling. We demonstrate all-optical detection of acoustic paramagnetic resonance without microwave magnetic fields, relevant for sensing applications. Finally, we show mechanically driven Autler–Townes splittings and magnetically forbidden Rabi oscillations. These results offer a basis for full strain control of three-level spin systems.The authors use surface acoustic waves, focused in a Gaussian geometry, to manipulate the spin state of divacancy defects in silicon carbide via mechanical driving. They demonstrate that shear strain is important in controlling the spin transitions.
Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/12ae448746eb72331a76ce0345a77ad2cdc552a9
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In Atomic and Molecular Physics, and Optics
- Hailin Wang
- Stefania Castelletto
- Per Delsing
- Kartik Srinivasan
- J. I. Cirac
- Andrew J. Daley
- Frank Verstraete
- Mark Saffman
In Materials Chemistry
Citations in the corpus
- The 2019 surface acoustic waves roadmap (2019, methodology): “For the coherent spin-SAW coupling of ensemble VV centers in silicon carbide, a SAW resonator that focuses and confines acoustic waves in a Gaussian geometry has been developed [42].”
- Silicon carbide color centers for quantum applications (2020, background): “a) Sketch of the SAW resonator device of [158].”