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Hybrid spin-microcantilever sensor for environmental, chemical, and biological detection

机译：混合自旋微悬臂梁传感器，用于环境，化学和生物检测

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摘要

Nowadays hybrid spin-microanomechanical systems are being actively explored for potential quantum sensing applications. In combination with the pump-probe technique or the spin resonance spectrum, we theoretically propose a realistic, feasible, and an exact way to measure the cantilever frequency in a hybrid spin-micromechanical cantilever system which has a strong coherent coupling of a single nitrogen vacancy center in the single-crystal diamond cantilever with the microcantilever. The probe absorption spectrum which exhibits new features such as mechanically induced three-photon resonance and ac Stark effect is obtained. Simultaneously, we further develop this hybrid spin-micromechanical system to be an ultrasensitive mass sensor, which can be operated at 300 K with a mass responsivity 0.137 Hz ag(-1), for accurate sensing of gaseous or aqueous environments, chemical vapors, and biomolecules. And the best performance on the minimum detectable mass can be 28.7 zg in vacuum. Finally, we illustrate an in situ measurement to detect Angiopoietin-1, a marker of tumor angiogenesis, accurately with this hybrid microcantilever at room temperature.
机译：如今，混合自旋微/纳米机械系统正在积极探索，以用于潜在的量子传感应用。理论上，结合泵浦探针技术或自旋共振谱，我们提出了一种现实，可行且准确的方法来测量具有单个氮空位的强相干耦合的混合自旋-微机械悬臂系统中的悬臂频率。单晶金刚石悬臂的中心与微悬臂的中心。获得了具有新特征的探针吸收光谱，例如机械诱导的三光子共振和交流斯塔克效应。同时，我们进一步开发了这种混合自旋微机械系统，使其成为一种超灵敏的质量传感器，可以在300 K的条件下以0.137 Hz ag（-1）的质量响应运行，以精确感测气态或水性环境，化学蒸汽和生物分子。在最小可检测质量上的最佳性能可以是28.7 zg真空。最后，我们举例说明了这种杂化微悬臂梁在室温下的原位测量，以准确检测肿瘤血管生成的标志物血管生成素-1。

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