Ultracoherent GHz Diamond Spin-Mechanical Lamb Wave Resonators

• URL: http://arxiv.org/abs/2408.13405v1
• Date: Fri, 23 Aug 2024 23:10:58 GMT
• Title: Ultracoherent GHz Diamond Spin-Mechanical Lamb Wave Resonators
• Authors: Xinzhu Li, Ignas Lekavicius, Jens Noeckel, Hailin Wang,
• Abstract summary: We develop an all-optical approach that excites the fundamental compression mode in a diamond Lamb wave resonator with an optical gradient force. We detect the induced vibrations via strain coupling to a silicon vacancy center, specifically, via phonon sidebands in the optical excitation spectrum of the silicon vacancy.
• Score: 3.429872985574403
• License: http://creativecommons.org/licenses/by/4.0/
• 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 the in-plane mechanical vibrations, for which conventional optical interferometry is not effective. These experiments demonstrate a GHz fundamental compression mode with a Q-factor >10^7 at temperatures near 7 K, providing a promising platform for reaching the quantum regime of spin mechanics, especially phononic cavity QED of electron spins.

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