论文标题
基于纳米纤维的位移传感器
Nanofiber based displacement sensor
论文作者
论文摘要
我们报告基于光学纳米纤维的位移传感器的实现。单个金纳米球形被沉积在纳米纤维的顶部，并将系统放置在具有位置标尺的常驻波中。在纤维的引导模式下收集的散射光可直接衡量纳米纤维位移。我们校准了我们的设备，并找到了高达1.2〜nm/$ \ sqrt {\ text {hz}} $的灵敏度。然后使用基于MIE散射理论的机械模型通过外部激光评估纳米纤维上的光学诱导力。通过我们的传感系统，我们证明可以检测到在纳米纤维腰部施加的1〜Pn的外力。
We report on the realization of a displacement sensor based on an optical nanofiber. A single gold nano-sphere is deposited on top of a nanofiber and the system is placed within a standing wave which serves as a position ruler. Scattered light collected within the guided mode of the fiber gives a direct measure of the nanofiber displacement. We calibrated our device and found a sensitivity up to 1.2~nm/$\sqrt{\text{Hz}}$. A mechanical model based on the Mie scattering theory is then used to evaluate the optically induced force on the nanofiber by an external laser. With our sensing system, we demonstrate that an external force of 1~pN applied at the nanofiber waist can be detected.
