High <i>Q</i>-Factor Diamond Optomechanical Resonators with Silicon Vacancy Centers at Millikelvin Temperatures.
basic_science · Level V
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- Record sourced from PubMed, PMID 38815209.
- Also identified by DOI 10.1021/acs.nanolett.3c04953.
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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 for interactions between phonons and a silicon vacancy (SiV) spin. Using optical measurements at millikelvin temperatures, we measure a line width of 13 kHz (<i>Q</i>-factor of ∼4.4 × 10<sup>5</sup>) 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.