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arXiv · 2310.18838

High Q-factor diamond optomechanical resonators with silicon vacancy centers at millikelvin temperatures

Graham D. Joe·Cleaven Chia·Benjamin Pingault·Michael Haas·Michelle Chalupnik·Eliza Cornell·Kazuhiro Kuruma·Bartholomeus Machielse·Neil Sinclair·Srujan Meesala·Marko Lončar
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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 interactions between phonons and a silicon vacancy (SiV) spin. Using optical measurements at millikelvin temperatures, we measure a linewidth of 13 kHz (Q-factor of ~440,000) for 6 GHz acoustic modes, a record for diamond in the GHz frequency range and within an order of magnitude of state-of-the-art linewidths for OMCs in silicon. We investigate SiV optical and spin properties in these devices and outline a path towards a coherent spin-phonon interface.

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Graham D. Joe, Cleaven Chia, Benjamin Pingault, Michael Haas, Michelle Chalupnik, Eliza Cornell, Kazuhiro Kuruma, Bartholomeus Machielse, Neil Sinclair, Srujan Meesala, Marko Lončar. 2023-10-28. High Q-factor diamond optomechanical resonators with silicon vacancy centers at millikelvin temperatures. https://arxiv.org/abs/2310.18838

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