High Q-Factor Diamond Optomechanical Resonators with Silicon Vacancy Centers at Millikelvin Temperatures

Journal article (2024)

Authors

Graham Joe Harvard School of Engineering and Applied Sciences
Cleaven Chia Harvard School of Engineering and Applied Sciences, A*STAR Computational Resource Centre (A*CRC)
Marko Lončar Harvard School of Engineering and Applied Sciences
Benjamin Pingault Argonne National Laboratory, QID/Taminiau Lab - QuTech Advanced Research Centre , Harvard School of Engineering and Applied Sciences, QuTech Advanced Research Centre
Michael de Haas Harvard School of Engineering and Applied Sciences
Michelle Chalupnik Harvard School of Engineering and Applied Sciences
Eliza Cornell Harvard School of Engineering and Applied Sciences
Kazuhiro Kuruma Harvard School of Engineering and Applied Sciences
B. Machielse Harvard University
Neil Sinclair Harvard School of Engineering and Applied Sciences
Srujan Meesala California Institute of Technology
Research Group
QID/Taminiau Lab (QuTech Advanced Research Centre) (TU Delft)
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Published Date

2024

Language

English

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Faculty

QuTech Advanced Research Centre

Department

Quantum Internet Division

Research Group

QID/Taminiau Lab

Abstract

Phonons are envisioned as coherent intermediaries between different types of quantum systems. Engineered nanoscale devices, such as optomechanical crystals (OMCs), provide a platform to utilize phonons as quantum information carriers. Here we demonstrate OMCs in diamond designed for strong for interactions between phonons and a silicon vacancy (SiV) spin. Using optical measurements at millikelvin temperatures, we measure a line width of 13 kHz (Q-factor of ∼4.4 × 105) for a 6 GHz acoustic mode, a record for diamond in the GHz frequency range and within an order of magnitude of state-of-the-art line widths for OMCs in silicon. We investigate SiV optical and spin properties in these devices and outline a path toward a coherent spin-phonon interface.

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