| Manipulating a micro-cantilever between its optomechanical bistable states in a lever-based Fabry-Pérot cavity |
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| 作者姓名： | FU Hao DING JiangFang LI Yong CAO GengYu |
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| 作者单位： | State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics,Chinese Academy of Sciences;University of Chinese Academy of Sciences;Beijing Computational Science Research Center |
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| 基金项目： | supported by the National Basic Research Program of China(Grant No.2012CB922104);the National Natural Science Foundation of China(Grant Nos.11204357,11174027 and 11121403) |
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| 摘 要： | In this paper, we demonstrate experimentally switching a cantilever between its optomechanical bistable states in a low finesse optical cavity. Our experiment shows that the deformation of cantilever can be manipulated by tuning the cavity resonance. When the laser power increases across the threshold value of 110 ?W, optomechanical bistability is induced by strong static photothermal backaction at room temperature. Numerical calculation revealed that the bistable effect originates from the multi-well potential created via the optomechanical interaction. Switching of the cantilever between the bistable states was achieved by tuning the cavity to the corresponding boundaries of the bistable region, where the barrier between the bistable states vanishes.
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| 关 键 词： | optomechanical bistability static deformation control optomechanical switch photothermal backaction micro-canti-lever |
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