论文标题
基于纳米梁的光纤量子探针用于磁场和生物传感
Nanodiamonds based optical-fiber quantum probe for magnetic field and biological sensing
论文作者
论文摘要
由于独特的电子自旋特性，托管在钻石中的氮呈（NV）中心已成为各种物理参数和生物物种的强大量子传感器。在这项工作中，开发了一个微型光纤量子探针，该探针通过化学修饰的纳米座NV中心在锥纤维尖端的表面上配置。基于持续波的光学检测到的磁共振方法和锁定扩增技术，发现探针的传感性能可以通过改变化学修饰过程中的纳米座量分散浓度和修饰持续时间来设计。结合一对磁通量浓度器，探针的磁场检测灵敏度显着增强至0.57 nt/hz1/2 @ 1Hz，这是基于纳米原子NV的纤维磁力计中的新记录。将GD3+作为演示，也通过实验证明了探针检测中探针的能力。我们的工作提供了一种新的方法来开发NV中心，作为具有高集成，微型大小，多功能和高灵敏度等的量子探针。
Owing to the unique electronic spin properties, the nitrogen-vacancy (NV) centers hosted in diamond have emerged as a powerful quantum sensor for various physical parameters and biological species. In this work, a miniature optical-fiber quantum probe, configured by chemically-modifying nanodiamonds NV centers on the surface of a cone fiber tip, is developed. Based on continue-wave optically detected magnetic resonance method and lock-in amplifying technique, it is found that the sensing performance of the probe can be engineered by varying the nanodiamonds dispersion concentration and modification duration in the chemical modification process. Combined with a pair of magnetic flux concentrators, the magnetic field detection sensitivity of the probe is significantly enhanced to 0.57 nT/Hz1/2 @ 1Hz, a new record among the fiber magnetometers based on nanodiamonds NV. Taking Gd3+ as the demo, the capability of the probe in paramagnetic species detection is also demonstrated experimentally. Our work provides a new approach to develop NV center as quantum probe featuring high integration, miniature size, multifunction, and high sensitivity, etc.
