Micro-Gas Flow Induced Stochastic Resonance of a Nonlinear Nanomechanical Resonator
Shaochun Lin1,2,3, Tian Tian1,2,3, Peiran Yin4, Pu Huang4, Liang Zhang1,2,3*, and Jiangfeng Du1,2,3*
1Hefei National Laboratory for Physical Science at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China 2CAS Key Laboratory of Microscale Magnetic Resonance, University of Science and Technology of China, Hefei 230026, China 3Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China 4National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China
Abstract：Fluidics is one of the most historic subjects that are well-established over centuries on the macroscopic scale. In recent years, fluid detection using a number of micro/nano scale devices has been achieved. However, the interaction of microfluid and solid devices on micro/nano-meter scale still lacks in-depth research. We demonstrate a practical nanomechanical detector for microfluidics via a string resonator with high $Q$-factor, suspended over a hole. This device is placed under a jet nozzle with several microns of diameter, and the interaction between the micro-gas flow and the resonator is observed by monitoring the variation of the fundamental frequency and the quality factor. Moreover, we manage to measure the fluctuations of the micro-gas flow on the nanomechanical resonator by means of stochastic resonance. This work manifests a potential platform for detecting dynamical fluid behaviors at microscopic scale for novel fluid physics.
2021, Vol. 38 
