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<p>We present an optomechanical device platform for characterization of rheological, optical and thermal properties of fluids on the micron scale. A suspended silicon microdisk resonator with a vibrating mass of 100 <i>pg</i> and an effective probing volume of less than a <i>p</i><i>L</i> is used to monitor properties of different fluids at rest. By employing analytical models for fluid-structure interactions, thermo-optical effects and thermal diffusion, our platform determines the viscosity, density, compressibility, refractive index and thermal conductivity of the fluid, in a compact measurement setup. A single measurement takes as short as 70 μs, and the employed power can be less than 100 μW, guaranteeing measurement at rest and in thermal equilibrium.</p>

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Multiphysics optomechanical sensing of a liquid on the micron scale

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月5日

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  • Hamidreza Neshasteh,
  • Amideddin Mataji-Kojouri,
  • Clément Le Fur,
  • Ilan Shlesinger,
  • Marco Ravaro,
  • Marc Gély,
  • Sébastien Hentz,
  • Guillaume Jourdan,
  • Ivan Favero

摘要

We present an optomechanical device platform for characterization of rheological, optical and thermal properties of fluids on the micron scale. A suspended silicon microdisk resonator with a vibrating mass of 100 pg and an effective probing volume of less than a pL is used to monitor properties of different fluids at rest. By employing analytical models for fluid-structure interactions, thermo-optical effects and thermal diffusion, our platform determines the viscosity, density, compressibility, refractive index and thermal conductivity of the fluid, in a compact measurement setup. A single measurement takes as short as 70 μs, and the employed power can be less than 100 μW, guaranteeing measurement at rest and in thermal equilibrium.