Sophie Ding

Sep 10, 2024 | nature.com | Sophie Ding |XingHan Guo |Chang Jin |Zixi Li |David D. Awschalom |Nazar Delegan | +2 more

Correction to: Nature Communications https://doi.org/10.1038/s41467-024-50667-5, published online 28 July 2024In this article Sophie W. Ding, Michael Haas, and Xinghan Guo should have been denoted as equally contributing authors. The original article has been corrected.

Jul 28, 2024 | nature.com | Sophie Ding |Michael J. Haas |David D. Awschalom

Quantum information technology offers the potential to realize unprecedented computational resources via secure channels distributing entanglement between quantum computers. Diamond, as a host to optically-accessible spin qubits, is a leading platform to realize quantum memory nodes needed to extend such quantum links. Photonic crystal (PhC) cavities enhance light-matter interaction and are essential for an efficient interface between spins and photons that are used to store and communicate quantum information respectively. Here, we demonstrate one- and two-dimensional PhC cavities fabricated in thin-film diamonds, featuring quality factors (Q) of 1.8 × 105 and 1.6 × 105, respectively, the highest Qs for visible PhC cavities realized in any material. Importantly, our fabrication process is simple and high-yield, based on conventional planar fabrication techniques, in contrast to the previous with complex undercut processes. We also demonstrate fiber-coupled 1D PhC cavities with high photon extraction efficiency, and optical coupling between a single SiV center and such a cavity at 4 K achieving a Purcell factor of 18. The demonstrated photonic platform may fundamentally improve the performance and scalability of quantum nodes and expedite the development of related technologies. Improving the performance and scalability of quantum nodes is of paramount importance to expedite the development of quantum technologies. Here the authors demonstrate fiber-coupled 1D PhC cavities with high photon extraction efficiency, and optical coupling between a single SiV center and such a cavity.

Jan 19, 2024 | link.aps.org | Sophie Ding |Benjamin Pingault |Linbo Shao |Neil Sinclair

Efficient generation, guiding, and detection of phonons, or mechanical vibrations, are of interest in various fields, including radio-frequency communication, sensing, and quantum information. Diamond is a useful platform for phononics because of the presence of strain-sensitive spin qubits, and its high Young’s modulus, which allows for low-loss gigahertz devices.