| Study on silicon micro-resonators by using a novel optical excitation and detection apparatus |
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| 作者姓名： | 刘英明 王向朝 王学锋 |
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| 作者单位： | Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences，Shanghai 201800 Graduate School of the Chinese Academy of Science，Beijing 100039，Shanghai Institute of Optics and Fine Mechanics，Chinese Academy of Sciences，Shanghai 201800，Shanghai Institute of Optics and Fine Mechanics，Chinese Academy of Sciences，Shanghai 201800 |
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| 基金项目： | This work was supported by the National Natural Science Pundation under Grant No. 60578051. |
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| 摘 要： | A novel optical excitation and detection apparatus was used to investigate the characteristics of silicon micro-resonators, which was activated into vibration by a laser beam irradiation. The beam diameter of the excitation light was less than 10 μm. The vibration amplitude of the resonator was detected by the interferometer with high resolution of 0.1 nm and measurement repeatability of less than 3 nm. The resonant frequency of the micro-resonator was obtained to be 8.75 kHz with full-width at half-maximum (FWHM) of 0.18 kHz. It is shown that the method is useful and reliable for measuring micro-displacement and micro-vibration of minute objects with nanometer accuracy.
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