Author:
Guan Shengguo,Sun Jing,Huang Biao,Cheng Yanbei,Duan Zhenglu,Le Jianxin
Abstract
Mechanical oscillators are widely used in many fields of physics, including ultrahigh precision measurements, gravity experiments, and optical mechanical systems. A sub-gram-scale silicon wafer is suspended by a tungsten wire with a diameter of 8 µm, forming a torsion pendulum to detect the laser radiation pressure. We demonstrate the application of a low-frequency, highly sensitive torsion pendulum for the measurement of light forces. In the feedback cooling state, the system exhibits a force sensitivity at the end of the pendulum close to 0.1 fN, approaches the thermal noise limit, and reaches the detection level of the laser radiation pressure of 60 nW.
Funder
National Natural Science Foundation of China
Major Discipline Academic and Technical Leaders Training Program of Jiangxi Province
Subject
Atomic and Molecular Physics, and Optics
Cited by
1 articles.
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