Optically levitated micro gyroscopes with an MHz rotational vaterite rotor  

作　　者：Kai Zeng Xiangming Xu Yulie Wu Xuezhong Wu Dingbang Xiao 

机构地区：[1]College of Intelligence Science and Technology,National University of Defense Technology,Changsha 410073,China [2]College of Information and Communication,National University of Defense Technology,Wuhan 430000,China [3]Key Laboratory of Satellite Navigation Technology,National University of Defense Technology,Changsha 410073,China

出　　处：《Microsystems & Nanoengineering》2024年第3期219-227,共9页微系统与纳米工程（英文）

基　　金：supported by the National Natural Science Foundation of China(51975579).

摘　　要：The field of levitated optomechanics has experienced significant advancements in manipulating the translational and rotational dynamics of optically levitated particles and exploring their sensing applications.The concept of using optically levitated particles as gyroscopes to measure angular motion has long been explored but has not yet been proven either theoretically or experimentally.In this study,we present the first rotor gyroscope based on optically levitated high-speed rotating particles.The gyroscope is composed of a micrometer-size ellipsoidal vaterite particle that is driven to rotate at MHz frequencies in a vacuum environment.When an external angular velocity is input,the optical axis deviates from its initial position,resulting in changes in the frequency and amplitude of the rotational signal.By analyzing these changes,the angular velocity of the input can be accurately detected,making it the smallest rotor gyroscope in the world.The angular rate bias instability of the gyroscope is measured to be 0.08°/s and can be further improved to as low as 10^(−9)°/h theoretically by cooling the motion and increasing the angular moment of the levitated particle.Our work opens a new application paradigm for levitated optomechanical systems and may pave the way for the development of quantum rotor gyroscopes.

关 键 词：PARTICLES ROTATIONAL ANGULAR 

分 类 号：O57[理学—粒子物理与原子核物理]