艾伦方差
灵敏度(控制系统)
重力
物理
带宽(计算)
光学力
光学
计算机科学
工程类
电子工程
经典力学
电信
数学
光学镊子
统计
标准差
作者
Tao Liang,Shaochong Zhu,Peitong He,Zhiming Chen,Yingying Wang,Chun‐Zhu Li,Zhenhai Fu,Xiaowen Gao,Xinfan Chen,Nan Li,Qi Zhu,Huizhu Hu
标识
DOI:10.1016/j.fmre.2022.09.021
摘要
Optically levitated oscillators in high vacuum have excellent environmental isolation and low mass compared with conventional solid-state sensors, which makes them suitable for ultrasensitive force detection. The force resolution usually scales with the measurement bandwidth, which represents the ultimate detection capability of the system under ideal conditions if sufficient time is provided for measurement. However, considering the stability of a real system, a method based on the Allan variance is more reliable to evaluate the actual force detection performance. In this study, a levitated optomechanical system with a force detection sensitivity of 6.33 ± 1.62 zN/Hz1/2 was demonstrated. And for the first time, the Allan variance was introduced to evaluate the system stability due to the force sensitivity fluctuations. The force detection resolution of 166.40 ± 55.48 yN was reached at the optimal measurement time of 2751 s. The system demonstrated in this work has the best force detection performance in both sensitivity and resolution that have been reported so far for optically levitated particles. The reported high-sensitivity force detection system is an excellent candidate for the exploration of new physics such as fifth force searching, high-frequency gravitational waves detection, dark matter research and so on.
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