• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2020, Vol. 56 ›› Issue (13): 16-31.doi: 10.3901/JME.2020.13.016

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Advanced Sensing Technology Based on the Optical Trapping Force

LU Kuo1, LI Qingsong1, ZHOU Xin1, LI Lan1, WU Yulie1, WU Xuezhong1,2, XIAO Dingbang1,2   

  1. 1. College of Intelligence Science, National University of Defense Technology, Changsha 410072;
    2. Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, Changsha 410072
  • Received:2019-09-19 Revised:2019-12-20 Online:2020-07-05 Published:2020-08-01

Abstract: The light field has an optomechanical effect, which refers to the ability to change the momentum and angular momentum of the mechanical oscillator when the photon interacts with the mechanical oscillator. The sensing technology based on the optical trapping force, a novel sensing technology, realizes the dynamic manipulation and motion state monitoring of micro/nano-particles by utilizing the optical trap, which is generated by the photon linear momentum transfer. Combining the outstanding advantages of long decay time, high detection sensitivity, high precision and small system size, the optomechanical sensing system plays an important role in many frontier fields and has great potential for development. It has become a new hot topic in interdisciplinary researches recently. At first the development history of the optomechanical sensing technology are studied, followed by the optical trapping force's basic principles. Afterwards these typical applications of optomechanical effect in basic physics, quantum physics, ultra-high-speed rotation, biotechnology, inertial sensing, and weak force and torque detection are introduced. After summarizing the status of the internal research, the development characteristics of this advanced sensing technology based on the optical trapping force and the research gap between domestic and overseas are analyzed. Some suggestions for the development of the optomechanical sensing technology in China are put forward in the end.

Key words: optomechanical effect, optical trapping force, light trap, sensitivity, quality factor, sensor

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