Ultracoherent Gigahertz Diamond Spin-Mechanical Lamb Wave Resonators.
basic_science · Level V
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- Record sourced from PubMed, PMID 39171696.
- Also identified by DOI 10.1021/acs.nanolett.4c03071.
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Abstract
We report the development of an all-optical approach that excites the fundamental compression mode in a diamond Lamb wave resonator with an optical gradient force and detects the induced vibrations via strain coupling to a silicon vacancy center, specifically, via phonon sidebands in the optical excitation spectrum of the silicon vacancy. Sideband optical interferometry has also been used for the detection of in-plane mechanical vibrations, for which conventional optical interferometry is not effective. These experiments demonstrate a gigahertz fundamental compression mode with a <i>Q</i> factor of >10<sup>7</sup> at temperatures near 7 K, providing a promising platform for reaching the quantum regime of spin mechanics, especially phononic cavity quantum electrodynamics of electron spins.