the effect of viscous air damping on an optically actuated multilayer mos2 nanomechanical resonator using fabry-perot interference

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ID: 230133
2016
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Ranked #103 of 133 articles by views in progress in neuro-psychopharmacology & biological psychiatry

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Abstract
We demonstrated a multilayer molybdenum disulfide (MoS2) nanomechanical resonator by using optical Fabry-Perot (F-P) interferometric excitation and detection. The thin circular MoS2 nanomembrane with an approximate 8-nm thickness was transferred onto the endface of a ferrule with an inner diameter of 125 μm, which created a low finesse F-P interferometer with a cavity length of 39.92 μm. The effects of temperature and viscous air damping on resonance behavior of the resonator were investigated in the range of −10–80 °C. Along with the optomechanical behavior of the resonator in air, the measured resonance frequencies ranged from 36 kHz to 73 kHz with an extremely low inflection point at 20 °C, which conformed reasonably to those solved by previously obtained thermal expansion coefficients of MoS2. Further, a maximum quality (Q) factor of 1.35 for the resonator was observed at 0 °C due to viscous dissipation, in relation to the lower Knudsen number of 0.0025~0.0034 in the tested temperature range. Moreover, measurements of Q factor revealed little dependence of Q on resonance frequency and temperature. These measurements shed light on the mechanisms behind viscous air damping in MoS2, graphene, and other 2D resonators.
Reference Key
she2016nanomaterialsthe Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Yumei She;Cheng Li;Tian Lan;Xiaobin Peng;Qianwen Liu;Shangchun Fan
Journal progress in neuro-psychopharmacology & biological psychiatry
Year 2016
DOI
10.3390/nano6090162
URL
http://www.mdpi.com/2079-4991/6/9/162
Keywords
resonator fabry-perot interferencechemistry

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