Diamond Nanomechanical Resonators Protected by a Phononic Band Gap
Diamond Nanomechanical Resonators Protected by a Phononic Band Gap
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受声子带隙保护的金刚石纳米机械谐振器
DOI：
10.1021/acs.nanolett.2c04095
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发表时间：
2022
期刊：
影响因子：
10.8
通讯作者：
Wang, Hailin
中科院分区：
文献类型：
--
作者：
Li, Xinzhu;Lekavicius, Ignas;Wang, Hailin
我们报告的设计，制造，和表征的金刚石悬臂梁连接到声子正方形晶格。我们表明，强大的保护机械模式的声子带隙导致三个数量级的mechanicalQ-因素的增加，与theQ-因素超过106在频率高达100 MHz。温度相关的研究表明，在几个开尔文的Q因子仍然受到材料损耗的限制。高Q金刚石纳米机械谐振器为自旋力学研究提供了一个很有前途的混合量子系统。
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 mechanicalQ-factors, with theQ-factors exceeding 106at frequencies as high as 100 MHz. Temperature-dependent studies indicate that theQ-factors obtained at a few Kelvin are still limited by the materials loss. The high-Qdiamond nanomechanical resonators provide a promising hybrid quantum system for spin-mechanics studies.