Diamond Nanomechanical Resonators Protected by a Phononic Band Gap.
basic_science · Level V
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- Record sourced from PubMed, PMID 36515668.
- Also identified by DOI 10.1021/acs.nanolett.2c04095.
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Abstract
We report the design, fabrication, and characterization of diamond cantilevers attached to a phononic square lattice. We show that the robust protection of mechanical modes by phononic band gaps leads to a three-orders-of-magnitude increase in mechanical <i>Q</i>-factors, with the <i>Q</i>-factors exceeding 10<sup>6</sup> at frequencies as high as 100 MHz. Temperature-dependent studies indicate that the <i>Q</i>-factors obtained at a few Kelvin are still limited by the materials loss. The high-<i>Q</i> diamond nanomechanical resonators provide a promising hybrid quantum system for spin-mechanics studies.